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- Rider-Ericsson Hot Air Engine, Ford Exhibition Building, Century of Progress International Exposition, Chicago, Illinois, 1934 - Chicago's 1933-34 Century of Progress Exposition used the theme of progress to encourage optimism during the Depression. The Ford Exhibition Building, which sat on eleven acres at the fair and featured industrial demonstrations and informative displays like this, became the most talked-about exhibit of 1934.

- 1934
- Collections - Artifact
Rider-Ericsson Hot Air Engine, Ford Exhibition Building, Century of Progress International Exposition, Chicago, Illinois, 1934
Chicago's 1933-34 Century of Progress Exposition used the theme of progress to encourage optimism during the Depression. The Ford Exhibition Building, which sat on eleven acres at the fair and featured industrial demonstrations and informative displays like this, became the most talked-about exhibit of 1934.
- Heinrici Hot Air Engine, Ford Exhibition Building, Century of Progress International Exposition, Chicago, Illinois, 1934 - Chicago's 1933-34 Century of Progress Exposition used the theme of progress to encourage optimism during the Depression. The Ford Exhibition Building, which sat on eleven acres at the fair and featured industrial demonstrations and informative displays like this, became the most talked-about exhibit of 1934.

- 1934
- Collections - Artifact
Heinrici Hot Air Engine, Ford Exhibition Building, Century of Progress International Exposition, Chicago, Illinois, 1934
Chicago's 1933-34 Century of Progress Exposition used the theme of progress to encourage optimism during the Depression. The Ford Exhibition Building, which sat on eleven acres at the fair and featured industrial demonstrations and informative displays like this, became the most talked-about exhibit of 1934.
- Rider-Ericsson Hot Air Engine, Ford Exhibition Building, Century of Progress International Exposition, Chicago, Illinois, 1934 - Chicago's 1933-34 Century of Progress Exposition used the theme of progress to encourage optimism during the Depression. The Ford Exhibition Building, which sat on eleven acres at the fair and featured industrial demonstrations and informative displays like this, became the most talked-about exhibit of 1934.

- 1934
- Collections - Artifact
Rider-Ericsson Hot Air Engine, Ford Exhibition Building, Century of Progress International Exposition, Chicago, Illinois, 1934
Chicago's 1933-34 Century of Progress Exposition used the theme of progress to encourage optimism during the Depression. The Ford Exhibition Building, which sat on eleven acres at the fair and featured industrial demonstrations and informative displays like this, became the most talked-about exhibit of 1934.
- Scientific American, Bound Volume for July-December 1864, Vol. 11 - Massachusetts machinist Sylvester Roper patented a hot air engine that produced motion by harnessing the expansion and contraction of warming and cooling air. The December 3, 1864, issue of <em>Scientific American</em> described his engine. Roper also built at least seven steam-powered carriages and two steam-powered motorcycles years before automobiles -- as we know them -- appeared.

- 02 July 1864 - 24 December 1864
- Collections - Artifact
Scientific American, Bound Volume for July-December 1864, Vol. 11
Massachusetts machinist Sylvester Roper patented a hot air engine that produced motion by harnessing the expansion and contraction of warming and cooling air. The December 3, 1864, issue of Scientific American described his engine. Roper also built at least seven steam-powered carriages and two steam-powered motorcycles years before automobiles -- as we know them -- appeared.
- Rider-Ericsson Hot Air Engine, Ford Exhibition Building, Century of Progress International Exposition, Chicago, Illinois, 1934 - Chicago's 1933-34 Century of Progress Exposition used the theme of progress to encourage optimism during the Depression. The Ford Exhibition Building, which sat on eleven acres at the fair and featured industrial demonstrations and informative displays like this, became the most talked-about exhibit of 1934.

- 1934
- Collections - Artifact
Rider-Ericsson Hot Air Engine, Ford Exhibition Building, Century of Progress International Exposition, Chicago, Illinois, 1934
Chicago's 1933-34 Century of Progress Exposition used the theme of progress to encourage optimism during the Depression. The Ford Exhibition Building, which sat on eleven acres at the fair and featured industrial demonstrations and informative displays like this, became the most talked-about exhibit of 1934.
- Roper Hot Air Engine, 1870 -

- 1870
- Collections - Artifact
Roper Hot Air Engine, 1870