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Filter: Subject of Engineering
Filter: Subject of inventions
| Date: | 1919 |
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| Description: | Inventor, B.L. Boboroff, displays his vote recording device to members of the U.S. House of Representatives. |
| Date: | 1950 |
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| Description: | A man sets up a cone-shaped instrument designed to distill fresh water from salt water as he leans out of a small motor boat on the water. |
| Date: | 1863 |
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| Description: | A sketch of mechanical parts for an invention. |
| Date: | 1863 |
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| Description: | A John Muir sketch of a fancake draught of sawframe with crankshaft in position. Scale two inches per foot. Depth of frame 5 1/2 inches. Speed of cranks... |
| Date: | 1927 |
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| Description: | Front view of "Speck's cotton picker," taken for International Harvester's Engineering Department. |
| Date: | 07 19 1927 |
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| Description: | Left side view of Speck's cotton picker, taken for International Harvester's Engineering Department. |
| Date: | 1925 |
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| Description: | Photographic illustration of two men cutting wood with a saw powered by horses on a treadmill. The horses and treadmill were added by an artist's drawing. |
| Date: | 1896 |
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| Description: | 40 H.P. experimental tractor. Original caption reads: "40 H.P., Built in 1896." |
| Date: | 1933 |
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| Description: | Three-quarter right side rear view of a tractor prototype. On the right front front side of the tractor is a sign that reads: "M'f'd by The Ohio Mfg. Co., ... |
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