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| Date: | 1944 |
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| Description: | Arnold Batson works with natural and synthetic rubbers in the rubber laboratory at the Gas Power Engineering Department. The original caption reads: "Exper... |
| Date: | 1953 |
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| Description: | Dora Louise Bower and Ethel Mitchel determining a freezer's capacity in the lab at International Harvester's refrigeration works. |
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