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| Date: | 1926 |
|---|---|
| Description: | Dr. Stephen Babcock with an electric centrifuge butterfat tester. |
| Date: | 02 17 1913 |
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| Description: | Portrait of Thomas Alva Edison in his lab where he worked on his "talking moving machine." |
| Date: | 12 06 1957 |
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| Description: | The small black sensor on the end of the antenna of a model Vanguard satellite, will detect differences in radiation as the satellite passes over the earth... |
| Date: | 12 04 1957 |
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| Description: | Professor Verner Suomi of the University of Wisconsin meteorology department and leader of a university team building one of the U.S. satellites, is shown ... |
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