Date: | 04 12 1928 |
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Description: | Man taking chemical CaCO4 out of a jar to measure it on Toledo Scale in Ricketts laboratory at Agriculture Chemistry Building, University of Wisconsin. |
Date: | 09 1926 |
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Description: | Column failure testing at the University of Wisconsin Engineering Laboratory. |
Date: | 1926 |
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Description: | Special Kjeldahl apparatus in Dr. Edwin B. Fred's laboratory. |
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