SIC830234: An Allis Chalmers Model 35-K Tractor Plowing And Hillside Model 35-K Pulling A Combine / Bridgeman Images

SIC830687: Colburn Rail Type Multiple Spindle Drill / Bridgeman Images

SIC829878: Front wheel assembly of a Velocipede early bicycle, c.1875 (photo), American School, (19th century) / Bridgeman Images

SIC829887: A High Wheel Bicycle / Bridgeman Images

SIC829899: A Bronze Plaque For Communication / Bridgeman Images

SIC829947: The Great Train Story Exhibit At The Museum Of Science And Industry / Bridgeman Images

SIC829950: The Great Train Story Exhibit At The Museum Of Science And Industry / Bridgeman Images

SIC829956: The Great Train Story Exhibit At The Museum Of Science And Industry / Bridgeman Images

SIC829959: The Great Train Story Exhibit At The Museum Of Science And Industry / Bridgeman Images

SIC829983: The Great Train Story Exhibit At The Museum Of Science And Industry / Bridgeman Images

SIC829986: Two Boys Pose With HMS Pinafore Deck Painting, Chicago Public Schools Art Fair / Bridgeman Images

SIC829995: A Man In A Lab Coat Talks To Children About Radiation While Holding A White Rat, AEC Life Science Radiation Lab, c.1970 (b/w photo), American Photographer, (20th century) / Bridgeman Images

SIC830001: A U.S. Navy Hellcat Fighter Aircraft Landing On The Deck Of A Carrier / Bridgeman Images

SIC830010: An Assortment Of Aircraft On Display At Museum Of Science And Industry / Bridgeman Images

SIC830013: The Texaco No. 13 Plane On Display At Museum Of Science And Industry / Bridgeman Images

SIC830016: A Man Wax Concert Music Cylinders On An Edison Phonograph, Museum Of Science And Industry / Bridgeman Images

SIC830034: Two Young Children Performing A Mexican Hat Dance / Bridgeman Images

SIC830043: A Group Of Mexican Dancers / Bridgeman Images

SIC830067: A Group Of People Viewing A Display About Tody Greenberg / Bridgeman Images

SIC830070: A Group Of School Children At The Nickelodeon Theater Box Office / Bridgeman Images

SIC830085: 1773 Barrel Method, Resuscitation Technique / Bridgeman Images

SIC830094: 1886 J B Francis Method, Resuscitation Technique / Bridgeman Images

SIC830112: Two Seniors Looking At An Early Style Box Of Quaker Oats / Bridgeman Images

SIC830130: Two Girls Inspecting One Of The Oxygen Tanks From Skylab / Bridgeman Images

SIC830136: A Young Boy Looking at a Display of an Astronaut, Museum of Science and Industry, Chicago, Illinois, c.1970 (b/w photo), American Photographer, (20th century) / Bridgeman Images

SIC830142: A Gentleman Points To The Location Of Chicago On A Portrait Of America As Viewed From Space / Bridgeman Images

SIC830166: A Young Boy At The Planing Display / Bridgeman Images

SIC830181: A Large Dog Being Examined / Bridgeman Images

SIC830196: A Museum Employee Cleaning One Of The Planes On Display Inside The Museum Of Science And Industry / Bridgeman Images

SIC830226: An Allis Chalmers Standard Model U Tractor / Bridgeman Images

SIC830232: An Allis Chalmers Rumely Oil Pull Tractor / Bridgeman Images

SIC830238: Various Allis Chalmers Farm Plows / Bridgeman Images

SIC830328: The Advance-Rumely Number 3 Hillside Combine Harvester / Bridgeman Images

SIC830355: Rumely Ball-Bearing Crankshaft Feeder / Bridgeman Images

SIC830361: The Oil Pull Stationary Winch / Bridgeman Images

SIC830364: Advance-Rumely Husker-Shredder Big Eight Special / Bridgeman Images