http://www.heartlandscience.org/work daily 1.0 2015-12-15 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55c38848e4b008c5d5a7cc24/1438877771165/ Topics https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55c3934fe4b00a454e68821b/1438880591659/ Topics https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55770125e4b09e05ac6f7154/1433862446256/future+horizons+ohio Topics https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55c389dae4b0a71fa3c43ade/1438878170941/ Topics https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55c387dde4b0c2b2e462b6b1/1438877662331/ Topics https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55c385dce4b046940893826c/1438877155606/ Topics https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55c38a8fe4b038fa342fdbe7/1438878352839/ Topics https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55c38a37e4b0422957209aa1/1438878265930/ Topics 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https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/556f4bd0e4b0c882cd7e1611/1433357297358/IMG_7606.jpg Topics http://www.heartlandscience.org/medhs daily 0.75 2015-12-15 http://www.heartlandscience.org/medhs/femalemd monthly 0.5 2015-07-30 http://www.heartlandscience.org/medhs/richter monthly 0.5 2015-07-30 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b9758ce4b0d4259148089b/1438217613286/ Medhs - Ohio Name on the Scale https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b975bae4b08eb2a6e9218f/1438217666328/ Medhs - Ohio Name on the Scale http://www.heartlandscience.org/medhs/kidney monthly 0.5 2015-12-15 http://www.heartlandscience.org/medhs/michmor monthly 0.5 2015-07-29 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b8e4b4e4b0e7109cdcabd8/1438180533191/ Medhs - Michelson-Morley Experiment http://www.heartlandscience.org/medhs/clevclin monthly 0.5 2015-07-31 http://www.heartlandscience.org/medhs/tagamet monthly 0.5 2015-07-31 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bac128e4b0d0cc37a61a25/1438302504672/ Medhs - Tagamet is From Ohio http://www.heartlandscience.org/medhs/femdent monthly 0.5 2015-07-31 http://www.heartlandscience.org/medhs/dental monthly 0.5 2015-07-30 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b96829e4b07ffe1f5a3b5d/1438214185548/ Medhs - First Dental School http://www.heartlandscience.org/medhs/poliovac monthly 0.5 2015-07-30 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bab6f0e4b08d0b7eb721b8/1438299888756/ Medhs - Oral Polio Vaccine Namesake http://www.heartlandscience.org/medhs/gene monthly 0.5 2015-07-30 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b9727ce4b06dcee35e0744/1438216828513/ Medhs - Genetic Engineering Landmark http://www.heartlandscience.org/medhs/surgery monthly 0.5 2015-12-15 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b8e1abe4b035ae27c64474/1438179756103/ Medhs - Surgery Pioneer https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b8e1e2e4b0ebf4ba6c0dda/1438179811036/ Medhs - Surgery Pioneer http://www.heartlandscience.org/medhs/xray monthly 0.5 2015-12-15 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b8f060e4b0452509df9d03/1438183520456/ Medhs - Applying X-Rays in Medicine http://www.heartlandscience.org/medhs/anesthesia monthly 0.5 2015-07-29 http://www.heartlandscience.org/medhs/heimlich monthly 0.5 2015-07-29 http://www.heartlandscience.org/medhs/polioprod monthly 0.5 2015-07-30 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b97041e4b0202eae98a8f9/1438216258069/ Medhs - Polio Vaccine Production http://www.heartlandscience.org/medhs/battelle monthly 0.5 2015-07-30 http://www.heartlandscience.org/medhs/genetics monthly 0.5 2015-07-31 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55baba04e4b04ac89192993d/1438300676720/ Medhs - First Genetics Doctorate https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bab9e0e4b0a459046c1274/1438300640781/ Medhs - First Genetics Doctorate http://www.heartlandscience.org/barnspres daily 0.75 2015-09-18 http://www.heartlandscience.org/barnspres/barnpres12 monthly 0.5 2015-07-31 http://www.heartlandscience.org/barnspres/barnpres4 monthly 0.5 2015-09-18 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb98e2e4b0ac265e0e0590/1438357731649/ Barn Preservation https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb9913e4b0a6d2710a46e5/1438357780417/ Barn Preservation http://www.heartlandscience.org/barnspres/barnpres7 monthly 0.5 2015-07-31 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb9aefe4b09c317f874f0e/1438358256545/ Barn Preservation - Problems of Posts http://www.heartlandscience.org/barnspres/barnpres1 monthly 0.5 2015-07-31 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb97b9e4b0a6d2710a3f80/1438357434915/ Barn Preservation - Siding and Roofing http://www.heartlandscience.org/barnspres/barnpres14 monthly 0.5 2015-07-31 http://www.heartlandscience.org/barnspres/barnpres11 monthly 0.5 2015-07-31 http://www.heartlandscience.org/barnspres/barnpres13 monthly 0.5 2015-07-31 http://www.heartlandscience.org/barnspres/barnpres3 monthly 0.5 2015-07-31 http://www.heartlandscience.org/barnspres/barnpres8 monthly 0.5 2015-07-31 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb9b47e4b0901b5b58f0de/1438358350724/ Barn Preservation - Repair or Replacement of Plates http://www.heartlandscience.org/barnspres/barnpres2 monthly 0.5 2015-07-31 http://www.heartlandscience.org/barnspres/barnpres monthly 0.5 2015-07-31 http://www.heartlandscience.org/barnspres/barnpres5 monthly 0.5 2015-07-31 http://www.heartlandscience.org/barnspres/barnpres6 monthly 0.5 2015-07-31 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb9a96e4b08dd9a4e3f860/1438358167134/ Barn Preservation - Foundations and Sills http://www.heartlandscience.org/agrifood daily 0.75 2016-01-03 http://www.heartlandscience.org/agrifood/yelcorn monthly 0.5 2015-07-16 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55a7ed68e4b076d1fc6737b9/1437068649203/ Agrifood - Yellow Dent Corn https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55a7edb9e4b071d47c91cb21/1437068730431/ Agrifood - Yellow Dent Corn http://www.heartlandscience.org/agrifood/honey monthly 0.5 2016-01-01 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5685850d0ab377ae44d56b65/1451590973083/practicaltreatis02lang_0009.jpg Agrifood - Honey Industry Pioneers Movable comb hive, with glass on all sides. Image source: A practical treatise on the hive and honey-bee, 2nd edition, 1857, frontispiece (assessed from the Internet Archive, original contributor Library of Congress), by L. L. Langstroth, is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56869b75c647ad510aee7f5c/1451662201698/ Agrifood - Honey Industry Pioneers Bees on a honeycomb. The image shows a brood comb. In the middle of the comb some white grubs can be seen in their cells. Below left: Sealed brood cells shortly before the hatching of worker bees. Above right: The light-colored cells are sealed honey cells. Below, left and right: The yellow and ocher cells contain pollen. Image source: Bienen auf Wabe 2.jpg, 15 August 2006, by Waugsberg is licensed under CC BY-SA 3.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56858cb85a56682e0b737c19/1451593067857/gleaningsinbeecu101882medi_0007.jpg Agrifood - Honey Industry Pioneers Gleanings in Bee Culture, title page, February 1882. Image source: Gleanings in Bee Culture, title page, Vol. X, No. 2, February 1882 (assessed from the Internet Archive, original contributor University of Massachusetts Amherst Libraries) by A.I. Root, is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5684abc60ab37742d399dd20/1451535421115/ Agrifood - Honey Industry Pioneers Rev. L. L. Langstroth. Image source: The new bee-keepers' text book, 24th edition, 1878, page 218 (assessed from Biodiversity Heritage Library, original contributor Cornell University Library) by Albert J. King is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/agrifood/qoats monthly 0.5 2015-12-03 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/565fc0e6e4b0354e5b77ea6b/1449115880460/ Agrifood - Father of Snap, Crackle & Pop: Ferdinand Schumacher Quaker Oats Cereal Factory, Southeast corner of Broadway & Mill Streets, Akron, Summit County, Ohio, August 1979. Image source: Library of Congress, Prints & Photographs Division, Historic American Engineering Record, Reproduction number HAER OHIO,77-AKRO,7- by photographers Gregory Santos and Bruce Ford (additional bibliographic information here) is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/565e4dd2e4b062a4a305d6da/1449020925603/ Agrifood - Father of Snap, Crackle & Pop: Ferdinand Schumacher Ferdinand Schumacher portrait and signature ca. 1879. Image source: Brennan, J. Fletcher. The Biographical Cyclopaedia and Portrait Gallery of Distinguished Men, with an Historical Sketch of the State of Ohio. Cincinnati: Yorston, 1880, pp. 368-369 (derived from Internet Archive) is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/565e2f6fe4b0db5309210cfd/1449013192149/Quaker+Oats.png Agrifood - Father of Snap, Crackle & Pop: Ferdinand Schumacher Quaker Oats add in National Magazine, October 1905. Image source: National Magazine, October 1905, v.23 No. 1, pp. 139 (derived from Internet Archive) is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/agrifood/hotdog monthly 0.5 2015-12-07 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5665a68ae4b098da4d7e7bdf/1449502348078/ Agrifood - Hot Dog and Sports Concession Industry Baseball fans--"Hot dogs" for fans waiting for gates to open at Ebbets Field, Oct. 6, 1920. Image source: Library of Congress, Prints & Photographs Division, LC-DIG-ppmsca-18463 from the George Grantham Bain (1865–1944) collection has no known copyright restrictions https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5664c256e4b032b04c6a7def/1449443951227/A+modern+concession+stand+at+Providence+Park%2C+Portland%2C+Oregon%2C+11+April+2010. Agrifood - Hot Dog and Sports Concession Industry A modern concession stand at Providence Park, Portland, Oregon, 11 April 2010. Image source: PGE Park concession stand.JPG by Halvorsen brian is licensed under CC BY-SA 3.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5664e0eae4b0d6ae9d15fc82/1449454076878/576px-60m_Hot_Dog_Akasaka_Aug4_06.jpg Agrifood - Hot Dog and Sports Concession Industry The world's longest hot dog (as of August 4, 2006), measuring 60.3 m, at the Akasaka Prince Hotel, Akasaka, Tokyo, Japan, on August 4, 2006. Image source: 60m Hot Dog Akasaka Aug4 06.jpeg by Tim Lindenschmidt is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/agrifood/4hclub monthly 0.5 2015-12-10 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/566884d90ab377ddbc9d7f98/1449691221691/ Agrifood - 4-H Club Movement The Birthplace of 4-H, Ohio Historical Marker, in downtown Springfield, Ohio, 2015. Image source: The Ohio Academy of Science https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56688d7cbfe8731ec37034f8/1449692559284/_DSC4617_Low+Res.jpg Agrifood - 4-H Club Movement Sculpture by Mike Major showing a youthful A. B. Graham with two of his early club members as they present their projects, in downtown Springfield, Ohio, 2015. Image source: The Ohio Academy of Science https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5668c2a225981de264129e30/1449706148339/ Agrifood - 4-H Club Movement Some of the "Caesar Gang" boys demonstrating how to cull chickens to improve quality and quantity of product. Under direction of J. A. Wolfram County Agent, Webster Co. W. Va. State 4 H Fair, Charleston, W. Va. Oct. 13, 1921. Image source: Library of Congress, Prints & Photographs Division, National Child Labor Committee Collection, LC-DIG-nclc-04391 by Lewis W. Hine (1874-1940) has no known restrictions on publication http://www.heartlandscience.org/agrifood/aquac monthly 0.5 2015-12-21 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56760b3b1115e0704eaa37e6/1450576700361/ Agrifood - Aquaculture Pioneers Production cycle of Clarias gariepinus (North African Catfish). Image source: “How to Farm North African Catfish,” 15 October 2012, Copyright © www.TheFishSite.com - reproduced with permission https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56778a69b204d55fb346af2d/1450674857962/cu31924003244633_0046.jpg Agrifood - Aquaculture Pioneers New York State Hatching House—Interior View (ca. 1879). Image source: Fish Hatching and Fish Catching, 1879, Page 41 (assessed from Internet Archive, original contributor Cornell University Library) by by R.B. Roosevelt and Seth Green is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56775b9edc5cb43d5a9e40cd/1450663101310/Delta_Pride_Catfish_farm_harvest_DxO.jpg Agrifood - Aquaculture Pioneers Aquaculture - workers harvest catfish from the Delta Pride Catfish farms in Mississippi. Image source: Delta Pride Catfish farm harvest.jpg by Ken Hammond, USDA OnLine Photography Center, is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56771caf0e4c117c4c644cea/1450647419586/1024px-Louisiana_Catfish_Ponds_k4724-7.jpg Agrifood - Aquaculture Pioneers An aerial view of catfish ponds in Louisiana resembles an abstract painting, 5 March 2013. The color differences between ponds can be correlated to the number and type of algae present within the ponds. Image source: Louisiana Catfish Ponds k4724-7.jpg, and at flickr, a USDA photo by Scott Bauer, is licensed under CC BY 2.0 http://www.heartlandscience.org/agrifood/corn monthly 0.5 2015-12-22 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5678c983a976af9f4de34dd3/1450756576799/ Agrifood - Borer Resistant Corn European corn borer (Ostrinia nubilalis) in corn. Image source: Image Number: 1234158 by Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org is licensed under CC BY 3.0 US https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5678b28d2399a3acd1925b4f/1450750606730/800px-Corn_borer.jpg Agrifood - Borer Resistant Corn Healthy European corn borer, Ostrinia nubilalis. Image source: United States Department of Agriculture, Agricultural Research Service, Image Number K7834-3, by Keith Weller is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/agrifood/japples monthly 0.5 2016-01-03 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56875b7869a91ac1e4bf460f/1451711375845/ Agrifood - Johnny Appleseed Drawing of Jonathan Chapman, aka Johnny Appleseed. Image source: Johnny Appleseed 1.jpg (reprinted from Knapp, H. S. A History of the Pioneer and Modern Times of Ashland County. Philadelphia: J. B. Lippincott & Co, 1862, frontispiece (which bears a “digitized by Google” label)) by H. S. Knapp is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56884a7e7086d7b181868abc/1451773787028/786px-Melrose-Apfel.jpg Agrifood - Johnny Appleseed The Melrose apple: the official apple of the state of Ohio. The Melrose is a cultivar developed in Ohio by the Ohio Agricultural Research and Development Center, Wooster, in 1944. Image source: Melrose-Apfel.jpg by MarkusHagenlocher is licensed under CC BY-SA 3.0 http://www.heartlandscience.org/agrifood/durham monthly 0.5 2015-07-16 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55a7eb2be4b0533757283707/1437068076508/ Agrifood - The Durham Wheat Industry https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55a7eb8de4b0d3641d4ba795/1437068173965/ Agrifood - The Durham Wheat Industry http://www.heartlandscience.org/agrifood/ditcher monthly 0.5 2015-07-16 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55a801abe4b0b94e87b0033f/1437073835769/ Agrifood - Fast Ditcher https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55a80123e4b0d4b5d071f821/1437073699876/ Agrifood - Fast Ditcher http://www.heartlandscience.org/agrifood/lsavers monthly 0.5 2016-05-04 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5728126f7c65e4dbdad24028/1462244107272/photoplayvolume222chic_0262.jpg Agrifood - Holey American Icon: Life Savers Candy Pep-O-Mint Life Savers add in Photoplay Magazine, September 1922. Image source: Photoplay Magazine, September 1922, v.22, No. 4, pp. 2 (derived from Internet Archive) is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/565e016de4b0d05389774ab1/1449001337081/ Agrifood - Holey American Icon: Life Savers Candy The “Hole” Story: newspaper advisement for Life Savers candy, 1917. Image source: Evening public ledger. (Philadelphia [PA.]), 16 Oct. 1917, Final, Page 7 (derived from Chronicling America: Historic American Newspapers, Library of Congress) is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/agrifood/gum monthly 0.5 2015-12-10 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5669ac0c9cadb69fb2f67952/1449765901615/ Agrifood - Chewing Gum A Sapodilla tree trunk in a Yucatán forest (trunk is approximately 1-meter in diameter). Diagonal scars across trunk are the results of previous tapping for Chicle. Image source: Sapodilla-bark.jpg by Jim Conrad (website and article) is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5667ad98c21b8631e966516a/1449635226146/ Agrifood - Chewing Gum Improved Chewing-Gum, US patent 98304, granted to William Finley Semple, 1869. Image source: Patent #: US000098304 by the United States Patent and Trademark Office is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/agrifood/tomato monthly 0.5 2015-12-18 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5672da755a566877a057fc9a/1450367611856/ Agrifood - Father of the Modern Tomato Tomatoes around the world: Tomatoes being grown near the Arctic Circle in greenhouse heated entirely with water from geothermal source, Chena Hot Springs, 2011. Image source: The Ohio Academy of Science https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5673141a05f8e24f350e206a/1450382363757/awlivingstonsson1897livi_0104.jpg Agrifood - Father of the Modern Tomato Back cover from A. W. Livingston's Sons annual [catalog] of true blue seeds, 1897. Image source: A. W. Livingston's Sons annual of true blue seeds (accessed from Internet Archive) by Livingston Seed Company; Henry G. Gilbert Nursery and Seed Trade Catalog Collection (specifically here) is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5672d53925981db6c78e68e5/1450366269127/ Agrifood - Father of the Modern Tomato Tomatoes around the world: Tomato plant just after planting on a tomato farm in north Queensland, Australia, 17 July 2010. Image source: Tomato plant 1000x750.jpg by Noak Westerberg is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5673621825981db6c7946031/1450402799634/High+Street.png Agrifood - Father of the Modern Tomato High street entrance to retail store, 114 North High Street, Columbus, Ohio, from A. W. Livingston's Sons annual [catalog] of true blue seeds, page 2, 1897. Image source: A. W. Livingston's Sons annual of true blue seeds (accessed from Internet Archive) by Livingston Seed Company; Henry G. Gilbert Nursery and Seed Trade Catalog Collection (specifically here) is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/aeroav daily 0.75 2015-12-15 http://www.heartlandscience.org/aeroav/waco monthly 0.5 2015-10-02 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5609b9f5e4b0598d7ed0c019/1443478010332/ Aeroav - WACO Barnstorms the World Waco CG-4A. (U.S. Air Force photo). 060505-F-1234P-004.JPG. Image source: National Museum of the U.S. Air Force, public domain. https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5609d3bfe4b0c7a1bce60039/1443484608312/ Aeroav - WACO Barnstorms the World Waco Aircraft Company Waco UPF-7. Image source: Waco UPF-7 (G-UPFS) arrives RIAT Fairford 10thJuly2014 arp.jpg by Arpingstone is in the public domain. https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5609b23fe4b08a1ad6a01dc9/1443476035335/ Aeroav - WACO Barnstorms the World WACO 10 in the Canada Aviation Museum, Ottawa, Ontario, Canada. Image source: Waco 10 (GXE) 01.JPG by Ahunt is in the public domain. http://www.heartlandscience.org/aeroav/wrightbros monthly 0.5 2015-12-15 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5609d831e4b07c7ce70d7402/1443485748267/050407-F-1234P-028.JPG Aeroav - The Wright Brothers Orville and Wilbur Wright's first flight, Dec. 17, 1903, at Kittyhawk, N.C. (U.S. Air Force photo). First Flight. Image source: National Museum of the U.S. Air Force, public domain. https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5609defae4b02dcfcd48a605/1443487482737/ Aeroav - The Wright Brothers The Wright brothers at the International Aviation Tournament, Belmont Park, Long Island, N.Y., Oct. 1910. Image source: Wright Brothers in 1910.jpg, public domain. https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5609e4b9e4b0114144fdae98/1443813240351/ Aeroav - The Wright Brothers The second Wright glider was flown at Kitty Hawk, N.C., in July and August 1901. (U.S. Air Force photo). Wright Brothers, 1901. Image source: National Museum of the U.S. Air Force, public domain. http://www.heartlandscience.org/aeroav/windtun monthly 0.5 2015-10-02 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5606ce6ae4b02ca27d2e8734/1443286915846/ Aeroav - Model Modern Wind Tunnel Common Research Wind Tunnel Model at NASA Ames Research Center. Image source: NASA. https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5606b5cee4b017614f7f2f31/1443280488835/tunnel.jpg Aeroav - Model Modern Wind Tunnel Aerial View of the Unitary Plan Wind Tunnel at NASA Ames Research Center. Image source: NASA, Photographer-Roger Brimmer https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5606d10ce4b090376bf50dbc/1443289352393/ Aeroav - Model Modern Wind Tunnel Wright Brothers 1901 Wind Tunnel (replica). Image source: National Museum of the U.S. Air Force, public domain. https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5606dc97e4b02ca27d2ece4b/1443290303923/139233main_image_feature_464_ys_full.jpg Aeroav - Model Modern Wind Tunnel Icing Research Tunnel at NASA Glenn Research Center. Image source: NASA   http://www.heartlandscience.org/aeroav/hangar monthly 0.5 2015-10-01 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/560d7d89e4b0402643a5a306/1443724690300/544px-Goodyear_Airdock_interior.jpg Aeroav - Giant Hangar Goodyear Airdock interior, Circ. 1985. Image source: Goodyear Airdock interior.jpg, licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/560744cde4b08dbc6e7b5876/1443316997193/ Aeroav - Giant Hangar Exterior view of the Goodyear Airdock. Image source: Goodyear Airdock exterior.jpg, licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/aeroav/helicpoter monthly 0.5 2015-10-02 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56073adbe4b053dd46518c12/1443314396486/ Aeroav - First Successful Helicopter George de Bothezat (1882 - 1940) ca. 1910. Image source: Botezat.jpg, public domain. https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/560dfa09e4b033790a315659/1443756554174/De_Bothezat_Flying_Octopus.jpg Aeroav - First Successful Helicopter The de Bothezat helicopter, known as the "Flying Octopus", undergoes a test flight. Image source: De Bothezat Flying Octopus.jpg, licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/aeroav/astro monthly 0.5 2015-10-02 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/560eb7d0e4b0c454e0b5c53f/1443805138949/Official+Portrait+of+Neil+Armstrong Aeroav - America's Astronaut Factory Official Portrait of Neil Armstrong. Portrait of Astronaut Neil A. Armstrong, commander of the Apollo 11 Lunar Landing mission in his space suit. Image credit: NASA http://www.heartlandscience.org/aeroav/elecs monthly 0.5 2015-10-01 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56070494e4b0ffbc0fe8a85a/1443300501951/ Aeroav - Electricity for Deep Space Missions Cutaway view of a General Purpose Heat Source (GPHS) Radioisotope Thermoelectric Generators (RTG). Power source for Galileo, Cassini, Ulysses & New Horizons spacecraft. Image credit: NASA https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56070c91e4b0fb7874b65d0c/1443302546576/PIA19857_modest.jpg Aeroav - Electricity for Deep Space Missions PIA19857: Pluto in True Color (New Horizons photo). Image Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute. https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56072e1ae4b041f4f55e2d0d/1443311131972/ Aeroav - Electricity for Deep Space Missions The Mars Science Laboratory rover, Curiosity, took this self portrait, which shows its Radioisotope Thermoelectric Generator (RTG) at center. Location: The Heights of Mount Sharp. Image Credit: NASA/JPL-Caltech. https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56070754e4b0054d170426a9/1443301210473/ Aeroav - Electricity for Deep Space Missions General Purpose Heat Source (GPHS) Module. The GPHS module provides steady heat for a radioisotope power system. Image credit: NASA http://www.heartlandscience.org/aeroav/prop monthly 0.5 2015-10-02 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/560aa6bde4b0225c2924fcdb/1443538624525/%E2%80%9CPropeller+diagram.jpg%E2%80%9D+by+nydano+is+licensed+under+CC+BY+2.0 Aeroav - Amazing Propeller Advances The Hamilton Standard Propeller was used on most American fighters, bombers and transport aircraft of WWII. Source: “Propeller diagram.jpg” by nydano is licensed under CC BY 2.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/560abdb2e4b01a1c802bcaa2/1443544501106/Engine_of_Douglas_DC-3.jpg Aeroav - Amazing Propeller Advances Wright R-1820 Cyclone 9 and Hamilton Standard propeller of American Airlines Douglas DC-3 "Flagship Knoxville" at the American Airlines C.R. Smith Museum. Source: Engine of Douglas DC-3.jpg by Z22 is licensed under Attribution-Share Alike 4.0 International https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/560ac8f7e4b082bb0893cc26/1443547433132/ Aeroav - Amazing Propeller Advances Boeing B-17E. Image source: the National Museum of the U.S. Air Force, 060515-F-1234S-018.JPG, public domain. https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/560aafdde4b053ff51a43b65/1443540958062/ Aeroav - Amazing Propeller Advances Variable pitch angles of the propeller blades on an Airbus A400M (EC-404; MSN 004) at ILA Berlin Air Show 2012. Source: “Airbus A400M EC-404 ILA 2012 11 (cropped2).jpg” by Julian Herzog is licensed under Attribution 4.0 International http://www.heartlandscience.org/constr daily 0.75 2015-10-14 http://www.heartlandscience.org/constr/brooklyn monthly 0.5 2015-10-12 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/561c09f2e4b0c7d46ef01d06/1444678131867/CovingtonKY_JARoeblingBridge.jpg Constr - Brooklyn Bridge Model John A. Roebling Bridge, Covington-Cincinnati, 2004, by Rick Dikeman. Image source: CovingtonKY JARoeblingBridge.jpg by RickDikeman is licensed under CC BY 3.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/561c0334e4b04114a884a0f7/1444676410979/RoeblingBridge1870.jpg Constr - Brooklyn Bridge Model Suspension Bridge over the Ohio River, between Cincinnati, Ohio and Covington, Kentucky, circa 1870. Image source: RoeblingBridge1870.jpg. Licensed under Public Domain Mark 1.0. http://www.heartlandscience.org/constr/steel monthly 0.5 2015-10-12 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/561bee06e4b038a90ac36957/1444671029772/ Constr - Steel Construction Pioneer The Arcade in Cleveland, Ohio, looking south toward Euclid Avenue, Date 7 March 1966. Image source: Historic American Building Survey; Library of Congress HABS OHIO,18-CLEV,6-1. Accessed at: Cleveland Arcade, 1966.jpg. Licensed under Public Domain Mark 1.0. https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55aea965e4b0a617842e9ae5/1437509989796/ Constr - Steel Construction Pioneer https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/561bf9d2e4b0e0cb18436d42/1444674003873/ Constr - Steel Construction Pioneer "Early stereopticon photo card view of Cleveland Arcade" http://www.heartlandscience.org/constr/pave monthly 0.5 2015-10-13 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/561d49d8e4b0e3090f6d694f/1444760025861/ Constr - Street Pavement Pioneers Monument commemorating the first portland cement street in the United States, Bellefontaine, Ohio, October 6, 2005. Image source: Bellefontaine-ohio-cement-street-monument.jpg by Derek Jensen (Tysto), licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/561d4013e4b01352ce8b995f/1444757524931/450px-Bartholomew_statue%2C_Court_Avenue%2C_Bellefontaine.jpg Constr - Street Pavement Pioneers Statue of George Bartholomew on Court Avenue in Bellefontaine, Ohio, United States, 12 August 2008. Image source: Bartholomew statue, Court Avenue, Bellefontaine.jpg by User:Nyttend, licensed under Public Domain Mark 1.0   http://www.heartlandscience.org/constr/shovel monthly 0.5 2015-10-14 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/561dcf91e4b06a307b117f06/1444794319562/ Constr - Moving the Earth Marion Steam Shovel Model 90, 1908 image showing the shovel at work on the Panama Canal. Image taken from a 1915 Marion Shovel catalog. Image source: MarioModel90 1908.jpg by unknown author is licensed under Public Domain Mark 1.0 in the United States https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/561dae72e4b09810cb604498/1444785780034/ Constr - Moving the Earth Crawler-transporter #2 beginning a road test on 21 December 2004. Image source: Crawler-Transporter.jpg by NASA (also NASA photo KSC-04PD-2683), licensed under Public Domain Mark 1.0. See NASA media guidelines. http://www.heartlandscience.org/constr/vietmem monthly 0.5 2015-10-13 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/561c6e86e4b051ac164a9517/1444703880796/ Constr - Vietnam Veterans Memorial Vietnam memorial, Washington, D.C. October 13, 2003. Image source: Vietnam memorial dc c 20031013.jpg by Lorax is licensed under CC BY 3.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/561c7537e4b01e97b629fd01/1444705592905/ Constr - Vietnam Veterans Memorial Visitors to the Vietnam Veterans Memorial Wall, take rubbings of the name, of a family member, 16 June 2003. Image source: US Navy 030616-N-9593R-142 Visitors to the Vietnam Veterans Memorial Wall, take rubbings of the name, of a family member.jpg, U.S. Navy photo by Chief Warrant Officer Seth Rossman, licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/561c4c55e4b09f2277b7ae46/1444695126681/ Constr - Vietnam Veterans Memorial Maya Lin, architect and artist, 16 March 2007. Image source: Maya Lin 1.JPG by Sharon Styer at http://sharonstyer.com/ is licensed under CC BY 3.0 http://www.heartlandscience.org/constr/goldengate monthly 0.5 2015-10-13 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/561d24d3e4b013e48524af37/1444750549398/ Constr - Golden Gate Bridge's Roots Élévation du Pont du Golden Gate, 14 June 2006. Image source: Golden-Gate-Bridge.svg by Roulex 45 is licensed under CC BY 3.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/561d1705e4b0a03d3e832f0a/1444747117598/400px-Joseph_Strauss_Memorial.jpg Constr - Golden Gate Bridge's Roots Joseph Strauss (chief designer of the Golden Gate Bridge) Memorial, San Francisco, California, 22 March 2010. Image source: Joseph Strauss Memorial.jpg by Steven Pavlov is licensed under CC BY 3.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/561d2047e4b01e97b62d5052/1444749384680/800px-2010_Golden_Gate_Bridge.jpg Constr - Golden Gate Bridge's Roots The Golden Gate Bridge, San Francisco, California, 22 March 2010. Image source: 2010 Golden Gate Bridge.jpg by Steven Pavlov is licensed under CC BY 3.0 http://www.heartlandscience.org/energy daily 0.75 2016-01-28 http://www.heartlandscience.org/energy/boilers monthly 0.5 2016-01-28 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56aa5cf31c121023f670d69c/1454006631536/Stock_Aerial_new_logo.jpg Energy - Stoking a Revolution in Coal Combustion Aerial image of Stock Equipment Company, Chagrin Falls, Ohio. Image source: Stock Equipment Company, Chagrin Falls, Ohio, used with permission https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56aa4f3a76d99c1130fe62bb/1454002086401/ Energy - Stoking a Revolution in Coal Combustion Diagram of early gravimetric coal feeder. Image source: Stock Equipment Company, Chagrin Falls, Ohio, used with permission https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56aa558fcbced6380aae2b05/1454004969711/StockEquipmentFeeder_1.jpg Energy - Stoking a Revolution in Coal Combustion Stock Equipment Company feeder on display. Image source: Stock Equipment Company, Chagrin Falls, Ohio, used with permission https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56aa4930be7b96cd1e2aabb5/1454000810555/Arthur+Stock_1.jpg Energy - Stoking a Revolution in Coal Combustion Mr. Arthur J. Stock. Image source: Stock Equipment Company, Chagrin Falls, Ohio, used with permission http://www.heartlandscience.org/energy/midgley monthly 0.5 2015-11-14 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56455f8ae4b07ecc4602a176/1447387046320/ Energy - From Leaded Gas to Air Conditioning Ball-and-stick model of the tetraethyllead molecule. Color code: carbon, C, black; hydrogen, H, white; lead, Pb, blue-grey. Image source: Tetraethyllead-3D-balls.png by Jynto is licensed under Public Domain CC0 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56456977e4b0e7ffe7c0dd2d/1447389626562/ Energy - From Leaded Gas to Air Conditioning Ball-and-stick model of the dichlorodifluoromethane molecule. Color code: carbon, C, black; chlorine, Cl, yellow; fluorine, F, green. Image source: Dichlorodifluoromethane-3D-balls.png by Ben Mills and Jynto is licensed under Public Domain CC0 1.0 http://www.heartlandscience.org/energy/elecpower monthly 0.5 2015-07-25 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b3bb18e4b03d9124ee9254/1437842200755/ Energy - World's First in Electric Power http://www.heartlandscience.org/energy/gas monthly 0.5 2015-11-14 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/564782dce4b072d19f8f230f/1447527134214/ Energy - More Gasoline Per Barrel Anacortes Refinery (Tesoro Corporation), on the north end of March Point [state of Washington]; Mount Baker (10,781 feet, 3286 meters). Image source: Anacortes Refinery 31904.JPG by Walter Siegmund is licensed under CC BY 3.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56477211e4b0a2863f2f5702/1447522895222/ Energy - More Gasoline Per Barrel Manufacture of gasoline [sic], US patent 1049667, William M. Burton, 1913. Image source: Patent #: US001049667 (accessed from United States Patent and Trademark Office) by William M. Burton is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/energy/woods monthly 0.5 2015-11-11 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/564023a7e4b0385f73f92708/1447044076837/US299894-0.png Energy - Granville Woods Steam Boiler Furnace, US patent 299894, Granville T. Woods’ first patent, 1884. Image source: Patent #: US000299894 accessed from United States Patent and Trademark Office is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/563fee40e4b092155554ef03/1447030337915/ Energy - Granville Woods Granville T. Woods (1856-1910). Image source: Woodsgr.jpg (originally derived from Men of Mark: Eminent, Progressive and Rising, Pages 1-670 by William J. Simmons, Henry McNeal Turner, 1887, pp. 107) is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/energy/eleclight monthly 0.5 2015-11-12 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/564417afe4b0eadf5c6a5843/1447303095312/ Energy - Electrifying America's Cities Electric-Arc Lamp, US patent 312184, Charles F. Brush, 1885. Image source: Patent #: US000312184 (accessed from United States Patent and Trademark Office ) by Charles F. Brush is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5643de90e4b0c236a2509929/1447290193207/ Energy - Electrifying America's Cities Improvement in Magneto-Electric Machines, US patent 189997, Charles F. Brush, 1877. Image source: Patent #: US000189997 (accessed from United States Patent and Trademark Office ) by Charles F. Brush is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5643d084e4b08c803b822839/1447284871494/ Energy - Electrifying America's Cities Charles Francis Brush, (March 17, 1849 – June 15, 1929) was a U.S. inventor, entrepreneur and philanthropist, circa 1920. Image source: Charles F. Brush ca1920.jpg by unknown author is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/energy/edison monthly 0.5 2015-12-15 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/564795a2e4b00b34c12956de/1447532121733/ Energy - The Wizard From Ohio Edison Phonograph. Thomas Alva Edison statue unveiling ceremony, Ohio Statehouse Rotunda, May 20, 2015. Image source: The Ohio Academy of Science. https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/564797e6e4b069c54138d335/1447532725316/_DSC4227_Low+Res.jpg Energy - The Wizard From Ohio Edison Statue. Thomas Alva Edison statue unveiling ceremony, Ohio Statehouse Rotunda, May 20, 2015. Image source: The Ohio Academy of Science. https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5647918ee4b04fa71c75a708/1447531014878/_DSC0114_Low+Res.jpg Energy - The Wizard From Ohio Edison Mazda Lamps. Thomas Alva Edison statue unveiling ceremony, Ohio Statehouse Rotunda, May 20, 2015. Image source: The Ohio Academy of Science. http://www.heartlandscience.org/energy/metsys monthly 0.5 2015-11-16 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5649e9eae4b02d8d6e28de95/1447684695951/ Energy - Metric System Pioneer Scale of Things Chart. Image source: Basic Energy Sciences, U.S. Department of Energy, U.S. DOE Version 01-18-05, pmd by Office of Science, U.S. Department of Energy is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56492939e4b09f9eaeccde71/1447635301658/ Energy - Metric System Pioneer NIST LC 1140 – The Metric Pyramid is a helpful study aid that can be easily constructed with yellow cardstock to keep common approximate unit conversion factors for mass, length, area, volume, temperature, and energy close at hand. Image source: NIST LC 1140 Metric Pyramid by The National Institute of Standards and Technology (NIST), agency of the U.S. Department of Commerce is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5649169be4b0734a6c448f45/1447630491946/ Energy - Metric System Pioneer Thomas C. Mendenhall, 18 May 1918. Image source: T.C.Mendenhall-1918.jpg by Hell&Fischer Philadelphia is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/envir daily 0.75 2016-02-09 http://www.heartlandscience.org/envir/tva monthly 0.5 2016-02-09 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5661161fe4b0bcbe081b34c3/1455055194445/ Envir - TVA Model The Great Flood of 1913, Columbus, Ohio. Image source: 1913 Ohio Flood Gallery, image 3 of 28 (The Great Flood of 1913. Columbus, Ohio) from the photo archive of The Toledo Blade is reprinted with expressed permission of The Toledo Blade https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56ba5e5ac2ea51ee4f1b5412/1455057286549/ Envir - TVA Model Lockington Dam, Shelby County, Ohio, April 20, 1922. Image source: courtesy of The Miami Conservancy District https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56ba58d486db43d9e77d39d2/1455053104040/ Envir - TVA Model Miami Conservancy Dams & Levees. Image source: courtesy of The Miami Conservancy District http://www.heartlandscience.org/envir/weather monthly 0.5 2015-11-20 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/564f3c71e4b0e7a23326ff23/1448036522218/ Envir - First Municipal Weather Forecasting Tracks of Storm Centres for January 1873 from Monthly Weather Review vol. 1 issue 1. Image source: Monthly Weather Review Author and Subject Index 1873-1935 by National Oceanic and Atmospheric Administration Central Library Data Imaging Project is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/564e9ad5e4b055a0562e2065/1447992125130/pers0074.jpg Envir - First Municipal Weather Forecasting Professor Cleveland Abbe, circa 1900. Image source: Professor Cleveland Abbe by National Oceanic and Atmospheric Administration/Department of Commerce is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/envir/trees monthly 0.5 2015-12-14 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/566c7239a2bab89284f6abc3/1449947903464/ Envir - Davey: Father of Tree Surgery The Davey Truck Group, historical image. Image source: The Davey Tree Expert Company, used with permission https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/566c7fa11115e08749217dc2/1449951138246/ Envir - Davey: Father of Tree Surgery The Davey Tree Expert Company, corporate offices, Kent, Ohio. Image source: The Davey Tree Expert Company, used with permission https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/566c660640667a1cc16cb3f5/1449944582788/John+Davey.jpg Envir - Davey: Father of Tree Surgery John Davey, the “tree man” of Kent Ohio. Image source: The Davey Tree Expert Company, used with permission https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/566c6fe00e4c116bdc04b3ee/1449947105194/ Envir - Davey: Father of Tree Surgery The Davey Institute of Tree Sciences, historical classroom image. Image source: The Davey Tree Expert Company, used with permission http://www.heartlandscience.org/envir/extinct monthly 0.5 2015-11-19 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/564d513ae4b03008a55212db/1447907671150/ Envir - First Documented Animal Extinction Passenger Pigeon, Ectopistes migratorius, juvenile (left), male (center), female (right), offset reproduction of watercolor. Image source: Ectopistes migratoriusAAP042CA.jpg (derived from Birds of New York (New York State Museum. Memoir 12), Albany: University of the State of New York.) by Louis Agassiz Fuertes (1874–1927) is licensed under Public Domain Mark 1.0   https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/564de973e4b0a8275c779f93/1447946683955/c012539k.jpg Envir - First Documented Animal Extinction Passenger Pigeon Net, St. Anne's, Lower Canada, September 20, 1829. Image source: Passenger Pigeon Net, St. Anne's, Lower Canada (derived from Library and Archives Canada) by James Pattison Cockburn (1779-1847) has no restrictions on access or on use for reproduction or publication. https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/564d4855e4b02906811a1e49/1447905485813/ Envir - First Documented Animal Extinction Martha: the passenger pigeon in life. Image source: Published figures and plates of the extinct passenger pigeon, published 1921 (extracted from: Scientific Monthly, v. 12, no. 5, May 1921), by Robert W. Shufeldt (Robert Wilson), 1850-1934, is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/envir/sevenr monthly 0.5 2015-12-01 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/565cf0ade4b0bf05b0999e09/1448932590729/ Envir - The Seven Ranges Survey Ohio State Map References, 1887. Image source: Subdivisions of the Public Lands, 1887, p. 93 (derived from Library of Congress) by Jerome S. Higgins is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/565cb6d5e4b01a74eafaf968/1448916950233/ Envir - The Seven Ranges Survey The tract of land in Ohio called the Seven Ranges. Image source: Seven Ranges.png (derived from Peters, William E. (1918) Ohio Lands and Their Subdivision, pp. 66) by William E. Peters is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/envir/ozone monthly 0.5 2015-11-22 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56514a51e4b0280166955051/1448168026482/24x37_OZONEposter_front.jpg Envir - Rowland: Friend of the Environment The Ozone Hole - Over 30 years of NASA Observations. This poster illustrates data from five different missions that tracked the development of the ozone hole from space. Image source: The Ozone Hole - Over 30 years of NASA Observations by NASA Goddard Space Flight Center is licensed under NASA media usage guidelines https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56512236e4b058e88fc544ae/1448157750998/F__Sherwood_Rowland.jpg Envir - Rowland: Friend of the Environment F. Sherwood Rowland at the inaugural World Science Summit in New York City, 28 May 2008. Image source: F. Sherwood Rowland.jpg by Markus Pössel is licensed under CC Attribution-Share Alike 3.0 Unported https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56513c20e4b027b5078759a5/1448164406740/ Envir - Rowland: Friend of the Environment Ozone molecule. Image source: Ozone-montage.png by Benjah-bmm27 is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/envir/smound monthly 0.5 2015-12-01 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56539be1e4b060961025ee0a/1448319978999/ Envir - Serpent Mound Great Serpent in Adams County, Ohio, Plate XXXV from Ancient Monuments of the Mississippi Valley, 1848. Image Source: SD35 Serpent Mound Squier and Davis Plate XXXV gray-levels-cropped.png (derived from Ancient Monuments of the Mississippi Valley, published by the Smithsonian Institution, 1848) by Ephraim George Squier and Edwin Hamilton Davis is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5653b821e4b0a689b3f94b97/1448327202881/Serpent_Mound_%28aerial_view%29.jpg Envir - Serpent Mound Arial view of the Serpent Mound, 2002. Image source: Serpent Mound (aerial view).jpg by Timothy A. Price and Nichole I. Stump is licensed under CC BY-SA 3.0 http://www.heartlandscience.org/comm daily 0.75 2015-12-15 http://www.heartlandscience.org/comm/chemabs monthly 0.5 2015-07-22 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55afb1e1e4b0b8249039499f/1437577697626/scifinderpic.jpg Comm - Chemical Abstracts Service http://www.heartlandscience.org/comm/pricetags monthly 0.5 2015-07-22 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55aef907e4b0da5909fb455a/1437530376118/ Comm - Automated Price Tags http://www.heartlandscience.org/comm/penman monthly 0.5 2015-10-28 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/562ffefee4b064f49ce52e24/1445986047494/ Comm - Spencerian System of Penmanship Platt Rogers Spencer (1800-1864) invented the Spencerian method of penmanship. Image source: Platt rogers spencer.jpg by unknown author is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56300bc7e4b0926a4a5de1b2/1445989326888/ Comm - Spencerian System of Penmanship Example of Spencerian script by D.L. Musselman, 4 December 1884. Image source Spencerian example.jpg (originally derived from IAMPETH) is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/comm/pennypress monthly 0.5 2015-10-26 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/562d9e88e4b094a157a7793f/1445830282253/ Comm - Nation's First Mass Medium First home of the Cleveland Press on Frankfort Street, Cleveland, Ohio. Paper originally began in 1878 as Penny Press. Image source: Cleveland Press, first home, Frankfort Steet, Cleveland, Ohio, ca. 1878 by unknown photographer is from the E.W. Scripps Papers at the Ohio University Libraries and is in the public domain. https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/562d53a7e4b04e54c89c5957/1445811117435/ajaxhelper8XPZJ629.jpg Comm - Nation's First Mass Medium Scripps poses at his desk, ink staining his fingers, circa 1880s. Image source: W. Scripps as young newspaper publisher at desk, 1880s by unknown photographer is from the E.W. Scripps Papers at the Ohio University Libraries and is in the public domain. https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/562e3dd3e4b0c1aa729de6bc/1445871060919/Cincinnati_Post_sketch_from_The_Graphic_1885.jpg Comm - Nation's First Mass Medium Sketch of Cincinnati Post drawn by Peter J. Schaefer, and appearing on September 26, 1885 in The Graphic. Image source: Cincinnati Post sketch from The Graphic, 1885 by Peter J. Schaefer is from the E.W. Scripps Papers at the Ohio University Libraries and is in the public domain. http://www.heartlandscience.org/comm/mcguffy monthly 0.5 2015-10-28 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56304674e4b05cda5f7d1d8b/1446004340672/ Comm - McGuffy Reader Photo of William Holmes McGuffey, unknown date. Image source: William Holmes McGuffey.jpg (originally derived from Miami Univ. McGuffey Museum) by unknown author is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5630e073e4b0b164b44601d3/1446043766051/ Comm - McGuffy Reader Cover of McGuffey's First Eclectic Reader by William Holmes McGuffey, Truman and Smith Publishing, 1841. Image source: Cover of McGuffey's First Eclectic Reader.jpeg (originally derived from Miami University Libraries) by William Holmes McGuffey is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/comm/xerox monthly 0.5 2015-10-18 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56240f17e4b0a77217f3e154/1445203737076/ Comm - Xerox Copies Replica of Chester Carlson's original Xerox copier - Battelle Memorial Institute, Xerography, 505 King Avenue, Ohio State University, Columbus, Franklin County, OH. Image source: HAER OHIO,25-COLB,38A--1 (additional at Wikimedia Commons) by the U.S. federal government is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/comm/onlinecomp monthly 0.5 2015-10-19 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56250e04e4b0ad52bec5a745/1445268997669/ Comm - Online Computer Library Fredrick Kilgour (1914-2006) portrait as seen in the lobby of the Kilgour Building, Dublin, Ohio. The portrait was painted ca. 1992 by the artist Marvin Triguba (1930–2002). Image source: Kilgour Portrait.jpg by Mlet is licensed under CC BY 3.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/562518c8e4b0354a06c4b7e2/1445271755274/ Comm - Online Computer Library The Kilgour Building, the headquarters of the library non-profit OCLC, image date 13 June 2007. Image source: Kilgour Building, OCLC, Dublin, OH.jpg by Matkatamiba is licensed under CC BY 3.0 http://www.heartlandscience.org/comm/lexisnexis monthly 0.5 2015-07-22 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55afd4bfe4b0cd7abd9d676e/1437586624317/ Comm - Lexis-Nexis http://www.heartlandscience.org/comm/wreader monthly 0.5 2015-07-22 http://www.heartlandscience.org/comm/lcd monthly 0.5 2015-10-27 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/562fd095e4b001db234aff6b/1445974166266/ Comm - Improved LCD Displays Reflective twisted nematic w:liquid crystal display. 1.Vertical filter film to polarize the light as it enters. 2.Glass substrate with ITO electrodes. The shapes of these electrodes will determine the dark shapes that will appear when the LCD is turned on. Vertical ridges are etched on the surface so the liquid crystals are in line with the polarized light. 3.Twisted nematic liquid crystals. 4.Glass substrate with common electrode film (ITO) with horizontal ridges to line up with the horizontal filter. 5.Horizontal filter film to block/allow through light. 6.Reflective surface to send light back to viewer. Image source: LCD layers.svg by Ed g2s is licensed under CC BY 3.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/562fe7aae4b0fcc5570ca064/1445980075494/ Comm - Improved LCD Displays A modern tablet computer, one of numerous uses for the LCD. Image source: Tablet and Keyboard Dock by Dinominant is licensed under Public Domain Dedication CC0 1.0 http://www.heartlandscience.org/comm/bucks monthly 0.5 2015-10-30 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5633b7bde4b0743e128ec801/1446229950101/Mathew_Brady%2C_Portrait_of_Secretary_of_the_Treasury_Salmon_P__Chase%2C_officer_of_the_United_States_government_%281860%E2%80%931865%2C_full_version%29.jpg Comm - The Buck Stops Started Here Portrait of Secretary of the Treasury Salmon P. Chase. Portrait dated between 1860 and 1865. Image source: Mathew Brady, Portrait of Secretary of the Treasury Salmon P. Chase, officer of the United States government (1860–1865, full version).jpg (original derived from Library of Congress) by photographer Mathew Brady is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5633c2dae4b0293b21722dc5/1446232811840/ Comm - The Buck Stops Started Here Salmon P. Chase, Treasury Secretary, scribes "In God is our Trust," scratches out "is our" and overwrites "We" to arrive at "In God We Trust" in a 1863-12-09 letter to James Pollock, Director of the Philadelphia Mint. Image source: Chase to Pollock 1863-12-09 motto only.png (original derived from National Archives and Records Administration) by Salmon P. Chase is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/comm/radio monthly 0.5 2015-12-15 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56343bd6e4b04eb1509214e6/1446263767213/ Comm - First Radio Station American electrical engineer Lee de Forest, the inventor of the triode vacuum tube (the Audion), with two of his tubes. Image source: Lee De Forest with Audion tubes.jpg (original derived from Popular Radio, May 1922) by unknown photographer is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/563509d9e4b06cb878d72069/1446316507919/Audion_vacuum_tube_advertisement.png Comm - First Radio Station Advertisement for the Audion vacuum tube invented by Lee De Forest in 1907, from The Electrical Experimenter magazine, August 1916. Image source: Audion vacuum tube advertisement.png (originally derived from The Electrical Experimenter magazine, June 1916, volume 4, number 2, page 76) by Experimenter Publishing Company is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5634f936e4b0b0c359722d7c/1446312247586/ Comm - First Radio Station An early audion radio receiver built by the inventor of the audion vacuum tube, Lee De Forest, around 1914. Image source: Audion receiver.jpg (original derived from the Proceedings of the Institute of Radio Engineers, Volume 2, 1914) by Lee De Forest is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/comm/dictionary monthly 0.5 2015-11-11 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5625af36e4b0fd27aa86fcac/1445310264169/ Comm - Funk and Wagnall's Dictionary Logo of the Funk & Wagnalls Company, taken from the title page of Hoyt's New Cyclopedia Of Practical Quotations (1922). Image source: Internet Archive (also, Funk & Wagnalls Company Logo (Hoyt, 1922).jpg) by Funk & Wagnalls Company is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5643ae5ee4b0b0751fe8d7ea/1447278104030/ Comm - Funk and Wagnall's Dictionary The Wagnalls Memorial: breezeway in background, wishing well in foreground. Image source: image courtesy of The Wagnalls Memorial, used with permission. http://www.heartlandscience.org/comm/librarian monthly 0.5 2015-10-17 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56218152e4b021dd851d6257/1445036371619/ Comm - America's Librarian John Shaw Billings 1838-1913, image dated 1896 or earlier. Image source: John Shaw Billings 001.jpg (originally derived from Library Journal, Volume 21 1896 (New York Public Library Archives)) by unknown author is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56219247e4b013a54e87a1ea/1445040712651/ Comm - America's Librarian Entrance to the National Library of Medicine, October 9, 2008. Image source: Entrance to the National Library of Medicine, October 9, 2008.jpg by Sage Ross is licensed under CC BY 3.0 http://www.heartlandscience.org/comm/telecom monthly 0.5 2015-10-19 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5624357be4b06d615c9b211a/1445213641531/ Comm - Father of American Telecommunications Theodore Newton Vail, 1845-1920, bust portrait, facing left, Circa 1913. Image source: Library of Congress Reproduction Number: LC-USZ62-52121 (additional at Wikimedia Commons) by unknown author is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56245c9fe4b02f1548b5d5f6/1445223584775/ Comm - Father of American Telecommunications First transcontinental telephone call. Alexander Graham Bell (center), in New York City, 25 January 1915. Image source: Alexander Graham Bell, first transcontinental phone call, 25 Jan 1915.jpg by Irving Underhill Is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/comm/mail monthly 0.5 2015-10-26 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/562c2f7fe4b022641daa1d96/1445736323624/ Comm - Home Mail Delivery An unidentified rural carrier poses with his horse and wagon, Circa 1905. Image source: Rural Carrier with Horse and Wagon (also Flicker Commons) by unknown photographer; from Smithsonian Institution, National Postal Museum; has no known copyright restrictions, fair use https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/562d20c0e4b04d9c2ead3efc/1445798081892/ Comm - Home Mail Delivery An unidentified city letter carrier delivers mail to a woman along his route, circa 1908. Image source: Photograph of letter carrier delivering mail (also Flickr Commons) by unknown photographer; from Smithsonian Institution, National Postal Museum; has no known copyright restrictions, fair use http://www.heartlandscience.org/comm/tintype monthly 0.5 2015-11-01 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/563664fae4b0270138b7fa00/1446405371850/ Comm - TinType Photography Campaign button for Abraham Lincoln, 1860. Portrait appears in tintype. Image source: Lincoln button 1860 small high contrast.jpg (originally derived from Library of Congress) by Mathew Brady is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56366b28e4b0bcd8401cf1a4/1446406952551/ Comm - TinType Photography Two young women (Tintype), circa 1870. Image source: 2 Young Women.jpg (originally derived from Center for Lowell History, University of Massachusetts Lowell Libraries) by unknown author is licensed under Public Domain Mark 1.0 http://www.heartlandscience.org/comm/tickertake monthly 0.5 2015-11-01 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/563683cfe4b030f21bcd16c1/1446413264389/ Comm - Tickertape Machine Laws as President of the University of Missouri in 1876. Image source: SamuelLawsMissouri.jpg (originally derived from MIZZOU magazine, May 21, 2014) by unknown author is licensed under Public Domain Mark 1.0 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/56369b8ae4b03c27a7395741/1446419339487/ Comm - Tickertape Machine Thomas Edison Gold & Stock Telegraph, Henry Ford Museum, Dearborn, MI. Image source: Edison Stock Telegraph Ticker.jpg by H. Zimmer is licensed under CC BY 3.0 http://www.heartlandscience.org/manuf daily 0.75 2015-12-15 http://www.heartlandscience.org/manuf/bearings monthly 0.5 2015-07-27 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b65a54e4b0c3dfa57f78ae/1438014037075/ Manuf - Roller Bearings http://www.heartlandscience.org/manuf/bfgoodrich monthly 0.5 2015-12-15 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b5a0bbe4b0cf84699896e9/1437966523943/ Manuf - B. F. Goodrich Tires http://www.heartlandscience.org/manuf/poptop monthly 0.5 2015-07-28 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b6d503e4b0f4fbddc31d52/1438045443448/ Manuf - Pop-Top Cans http://www.heartlandscience.org/manuf/cardbooard monthly 0.5 2015-07-27 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b65425e4b0ce13f6fef181/1438012454388/ Manuf - Paper and Cardboard Manufacture http://www.heartlandscience.org/manuf/bottle monthly 0.5 2015-07-27 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b58d7ee4b076db67985a43/1437961599068/ Manuf - Automating Glass Bottle Manufacture http://www.heartlandscience.org/manuf/grocery monthly 0.5 2015-07-28 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b6cf92e4b0aa3090a11412/1438044050541/ Manuf - SOS: Paper Grocery Bag http://www.heartlandscience.org/manuf/goodyear monthly 0.5 2015-07-27 http://www.heartlandscience.org/manuf/paint monthly 0.5 2015-07-27 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b673bfe4b038ee5edb990b/1438020544310/ Manuf - "Cover the Earth" Started in Ohio http://www.heartlandscience.org/manuf/scale monthly 0.5 2015-07-27 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b6a92be4b0ce13f7013e87/1438034219815/ Manuf - Your Honest Weight? From Toledo https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b6a8e5e4b0c62a632ff808/1438034153821/ Manuf - Your Honest Weight? From Toledo https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b6a907e4b034a5976cc17b/1438034184259/ Manuf - Your Honest Weight? From Toledo http://www.heartlandscience.org/manuf/firestone monthly 0.5 2015-07-27 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b6526fe4b03d72e247d808/1438012016204/ Manuf - Firestone Tires http://www.heartlandscience.org/manuf/alcoa monthly 0.5 2015-07-27 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b58f95e4b07baccbcce150/1437962134045/ Manuf - World's Biggest Forging Press http://www.heartlandscience.org/manuf/register monthly 0.5 2015-07-27 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b69dbee4b0c62a632faa0f/1438031294674/ Manuf - First Cash Register https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b69d9be4b08c832d729b30/1438031259939/ Manuf - First Cash Register http://www.heartlandscience.org/manuf/ribbons monthly 0.5 2015-07-27 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b65e71e4b057b594516042/1438015090175/ Manuf - Ribbons of Steel http://www.heartlandscience.org/manuf/mgun monthly 0.5 2015-07-27 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b67621e4b04f6602024be1/1438021153759/ Manuf - First Machine Gun https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b67634e4b07baccbd0882d/1438021178846/ Manuf - First Machine Gun http://www.heartlandscience.org/manuf/processc monthly 0.5 2015-07-27 http://www.heartlandscience.org/manuf/firesafety monthly 0.5 2015-07-28 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b6c47be4b07c169ff5ca46/1438041212416/ Manuf - Fire Safety Firsts http://www.heartlandscience.org/matrls daily 0.75 2015-12-15 http://www.heartlandscience.org/matrls/aluminum monthly 0.5 2015-07-28 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b7869ae4b00871cfc1d8a9/1438090906671/ Matrls - First Process for Making Aluminum https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b786cde4b051b4a5caabb7/1438090957811/ Matrls - First Process for Making Aluminum http://www.heartlandscience.org/matrls/pottery monthly 0.5 2015-07-28 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b78cace4b00871cfc1f7a6/1438092460316/ Matrls - Pottery Capital of America http://www.heartlandscience.org/matrls/cellophane monthly 0.5 2015-12-15 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b6f410e4b04065b31094e3/1438053398159/ Matrls - Cellophane Packaging http://www.heartlandscience.org/matrls/pvc monthly 0.5 2015-12-15 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b6efe7e4b05e492e56bdc8/1438052327594/ Matrls - Invention of PVC Plastic http://www.heartlandscience.org/matrls/teflon monthly 0.5 2015-07-28 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b6f154e4b0e7b01e3aeb6c/1438052692328/ Matrls - Teflon http://www.heartlandscience.org/matrls/soap monthly 0.5 2015-07-28 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b79157e4b04e6f57f00943/1438093656040/ Matrls - Soap Industry Floated Out of Ohio http://www.heartlandscience.org/matrls/fiberglas monthly 0.5 2015-07-28 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b6ed1de4b0aa3090a1b1f9/1438051613960/ Matrls - Father of Fiberglas https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b6ed45e4b0590add6ada36/1438051654168/ Matrls - Father of Fiberglas http://www.heartlandscience.org/matrls/windows monthly 0.5 2015-12-15 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b6f788e4b0e36966d9534f/1438054280865/ Matrls - All the Windows in the World https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b6f7a6e4b08c3f4ba043b6/1438054311267/ Matrls - All the Windows in the World http://www.heartlandscience.org/trans daily 0.75 2015-12-15 http://www.heartlandscience.org/trans/fillup monthly 0.5 2015-07-29 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b8272fe4b05ac40f01da11/1438132015619/firstfillerup.jpg Trans - First Fill 'Er Up http://www.heartlandscience.org/trans/winton monthly 0.5 2015-12-15 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b82b40e4b0a3bfb52e7bd1/1438133057586/ Trans - First Regularly Produced Car and Ad http://www.heartlandscience.org/trans/elecauto monthly 0.5 2015-07-28 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b81484e4b03901832b7afe/1438127236391/ Trans - Electrifying the Automobile http://www.heartlandscience.org/trans/landveh monthly 0.5 2015-07-29 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b82ceee4b0a6b779d4691f/1438133487136/ Trans - World's Largest Land Vehicle https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b82d48e4b00aa535de6cfc/1438133581182/ Trans - World's Largest Land Vehicle http://www.heartlandscience.org/trans/gaspowered monthly 0.5 2015-12-15 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b81256e4b0e35848a6114e/1438126679100/ Trans - Nation's First Gasoline-Powered Automobile http://www.heartlandscience.org/trans/olds monthly 0.5 2015-07-29 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b828e8e4b044c6d345a47b/1438132457206/ Trans - Olds' Oldsmobile http://www.heartlandscience.org/trans/jeep monthly 0.5 2015-07-28 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b7e9fae4b0ad9e4a89d058/1438116347598/ Trans - The Jeep https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b7e9c5e4b0513ca3b94104/1438116293745/ Trans - The Jeep http://www.heartlandscience.org/trans/signal monthly 0.5 2015-07-28 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b7f014e4b009820d510510/1438117908997/ Trans - First Automatic Traffic Signal http://www.heartlandscience.org/trans/derby monthly 0.5 2015-12-15 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55b80c90e4b0a286c4c3d1ad/1438125200946/ Trans - First Soap Box Derby http://www.heartlandscience.org/barns daily 0.75 2015-07-31 http://www.heartlandscience.org/barns/barnsottrad monthly 0.5 2015-07-31 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb95d9e4b098c8db74c77b/1438356954115/ Barns - Other Traditional Barns http://www.heartlandscience.org/barns/preservation-and-conservation monthly 0.5 2015-06-11 http://www.heartlandscience.org/barns/barnsdairy monthly 0.5 2015-07-31 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb93aae4b0901b5b58c821/1438356394690/ Barns - Dairying Changes Barn Form https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb9390e4b0901b5b58c7a2/1438356372955/ Barns - Dairying Changes Barn Form http://www.heartlandscience.org/barns/barnstransv monthly 0.5 2015-07-31 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb9275e4b0c8b48b6a6ad9/1438356085967/ Barns - Transverse Frame Barns http://www.heartlandscience.org/barns/barnssaxon monthly 0.5 2015-07-31 http://www.heartlandscience.org/barns/barnssidehill monthly 0.5 2015-07-31 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb8aeee4b0ba586ad63f1a/1438354159506/barn12.gif Barns - Raised or Basement Barns https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb8ad4e4b0ba586ad63e90/1438354132971/ Barns - Raised or Basement Barns https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb8aa6e4b026bb29868aa3/1438354086821/ Barns - Raised or Basement Barns https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb8ac0e4b026bb29868b3d/1438354113039/ Barns - Raised or Basement Barns http://www.heartlandscience.org/barns/barnswi monthly 0.5 2015-07-31 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb9558e4b0a3278f99f83b/1438356825285/barn15.gif Barns - Wisconsin Dairy Barns http://www.heartlandscience.org/barns/barnscrib monthly 0.5 2015-07-31 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb8450e4b0d7157acff806/1438352464580/ Barns - Crib Barns https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb84a6e4b038a3687eed89/1438352550825/ Barns - Crib Barns https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb8424e4b028210db50218/1438352420684/ Barns - Crib Barns https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb83eee4b041382358151c/1438352367531/ Barns - Crib Barns http://www.heartlandscience.org/barns/barnsgbankb monthly 0.5 2015-07-31 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb868ee4b04ac89194f54a/1438353039094/ Barns - German Bank Barns https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb8769e4b0a505575a7e3a/1438353258143/ Barns - German Bank Barns https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb874be4b02c50d76d6226/1438353227765/ Barns - German Bank Barns https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb8784e4b0a505575a7f1b/1438353285438/ Barns - German Bank Barns http://www.heartlandscience.org/barns/side-hill-barns monthly 0.5 2015-07-31 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55bb8f12e4b0ba843f392615/1438355218507/ Barns - Side Hill Barns http://www.heartlandscience.org/contact daily 0.75 2018-09-28 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/5579dc9ee4b097d0c5b7c0ac/1434049695518/ohio+academy+of+science Contacts http://www.heartlandscience.org/55841d6de4b06a943e10ab1d daily 0.75 2015-06-19 http://www.heartlandscience.org/new-page-1 daily 0.75 2015-07-17 http://www.heartlandscience.org/about daily 0.75 2018-09-28 https://static1.squarespace.com/static/54d23339e4b05e3af8143898/t/55772985e4b09ab1be0d8049/1433872791299/welcome+to+ohio About