Date: | 1926 |
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Description: | Concrete chimney experiment at the University of Wisconsin. |
Date: | 1953 |
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Description: | International Harvester 27-75 earthmover being demonstrated in front of a grandstand at International Harvester's Phoenix Proving Ground. Opened in 1947, t... |
Date: | 1954 |
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Description: | Aerial view of the Phoenix Proving Ground during the 1954 Industrial Power Roundup, a large event promoting International Harvester's construction equipmen... |
Date: | 1960 |
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Description: | Slightly elevated view of three men working with an experimental crawler tractor indoors. Caption reads: "Experimental Crawler Tractor Equipped with a Turb... |
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