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| Date: | 1947 |
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| Description: | A man writes information on a chart as he weighs a can of milk in a barn. A row of cows standing in stalls is behind him. The man may be working at Interna... |
| Date: | 1940 |
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| Description: | A man inside a building uses a hanging scale to weigh a can of milk. He writes the weight on a chart hanging adjacent to the scale. |
| Date: | 07 09 1951 |
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| Description: | Dr. Eloise Gerry at her desk at the United States Forest Products Laboratory where she is a distinguished wood technologist. Dr. Gerry, whose research arti... |
| Date: | 02 1977 |
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| Description: | A man is kneeling on the ice and snow at Potter's Lake. He is running a machine that is testing the oxygen levels in the water, while recording the results... |
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