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| Date: | 1880 |
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| Description: | Illustration of a scientist in his lab gazing at a test tube, with a caption in German that translates to "Eureka! I have found it!". |
| Date: | 12 20 1943 |
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| Description: | Research engineer A.B. Welty stands next to the moisture controlling device at International Harvester Company's farm machinery engineering department. The... |
| Date: | 05 1928 |
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| Description: | Dr. Stephen Moulton Babcock seated on a stool and milking a cow. Another man stands near the head of the cow. They are in a fenced field near a road, most ... |
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