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Filter: Subject of microscopes
Filter: Year of 1900-1999
Filter: Year of 1940-1949
| Date: | 1944 |
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| Description: | William Koppa uses a microscope to examine a specimen of steel. The original caption reads: "Micro-photography is employed at International Harvester's Gas... |
| Date: | 02 18 1949 |
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| Description: | U.S. Army Major Herbert Crecelius of the army chemical corps studying agricultural bacteriology at the University of Wisconsin-Madison. He is in a lab coat... |
| Date: | 1943 |
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| Description: | A man using a microscope to match a ball bearing for an aircraft torpedo at an International Harvester factory. The original caption reads: "A powerful mic... |
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