Date: | 1926 |
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Description: | Comparative infection of "yellows" in a field of alfalfa and sweet clover. |
Date: | 1953 |
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Description: | Cacti frame three International semis and a pickup on a test track at International Harvester's Phoenix Proving Ground. Opened in 1947, the proving ground ... |
Date: | 05 1928 |
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Description: | Dr. Stephen Moulton Babcock seated on a stool and milking a cow. Another man stands near the head of the cow. They are in a fenced field near a road, most ... |
Date: | 08 10 1974 |
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Description: | Wisconsin congressmen David Obey (left) and former congressman Alvin O'Konski breaking ground for a United States Forest Services genetics lab. After the c... |
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