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| Date: | 1900 |
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| Description: | Downer College students working in a laboratory in which a human skeleton, a frog, a bat and stuffed birds are displayed. |
| Date: | 09 26 1946 |
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| Description: | Display in the window of a pharmacy, explaining what happens to uranium as atomic power is produced. |
| Date: | 05 15 1935 |
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| Description: | View of a U.S. Pharmacopeia Exhibit about a class of medications called 'digitalis' at the annual Philadelphia on Parade. Digitalis medicines are used to i... |
| Date: | 05 05 1937 |
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| Description: | View of an educational exhibit set up under the auspices of George Beal, for the U.S. Pharmacopeial Convention, at the dedication of the Mellon Institute. |
| Date: | 05 1936 |
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| Description: | A view of the U.S. Pharmacopeia's exhibit at the American Medical Association's 1931 Conference in Kansas City. The exhibit includes printed reference mate... |
| Date: | 01 27 1960 |
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| Description: | A farmer observes the processed results of the workings of an early computer or data machine. The machine was used to process and to organize data on a her... |
| Date: | 09 20 1956 |
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| Description: | Katharine Mather of the Corps of Engineers Waterways Experiment Station checks a computer analysis of the composition of cement. |
| Date: | 03 17 1955 |
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| Description: | Science fair entry using animals to test a high cholesterol diet against a control diet. |
| Date: | |
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| Description: | Students and teacher in classroom demonstrating an experiment with atomic energy. |
| Date: | 1949 |
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| Description: | Worker leveling gravel with a McCormick-Deering Farmall M tractor and a no. 7 angle dozer at International Harvester's Hinsdale farm and testing facility. |
| Date: | 1939 |
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| Description: | Elevated view of men harvesting grain with a McCormick-Deering 12 foot experimental combine (harvester-thresher) pulled by a Farmall M tractor. There is a ... |
| Date: | 06 02 1930 |
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| Description: | Engineering photograph of an experimental No. 20 TracTracTor (crawler tractor). Left side view. |
| Date: | 12 16 1929 |
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| Description: | Engineering photograph of an experimental McCormick-Deering 15-30 TracTracTor (crawler tractor). Right side view. |
| Date: | 04 30 1928 |
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| Description: | Engineering photograph of an experimental 10-20 McCormick-Deering TracTracTor (crawler tractor). Side view, right. |
| Date: | 12 10 1940 |
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| Description: | Engineering left side view of a McCormick-Deering Farmall M high clearance (high crop) tractor with cane attachment. |
| Date: | 03 01 1939 |
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| Description: | Engineering photograph of an experimental Farmall tractor designated as model "3F". Right side view. |
| Date: | 08 08 1938 |
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| Description: | Engineering photograph of an experimental Farmall tractor designated as model "2F". Right side view. |
| Date: | 04 21 1938 |
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| Description: | Engineering photograph of an experimental Farmall tractor "with air pre-cleaner" designated as model "F-10". Three-quarter view towards front right. |
| Date: | 12 09 1938 |
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| Description: | Engineering photograph of an experimental Farmall tractor (wood model) designated as model "2F". Three-quarter view towards left front. |
| Date: | 06 02 1938 |
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| Description: | Engineering photograph of an experimental Farmall tractor designated as model "1-F". Left side view. |
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