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| Date: | 10 07 1929 |
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| Description: | Experimental McCormick-Deering 15-30 tractor parked outside a brick building (possibly International Harvester's Tractor Works in Chicago). This photograp... |
| Date: | 10 07 1929 |
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| Description: | Experimental McCormick-Deering 15-30 tractor parked outside a brick building (possibly International Harvester's Tractor Works). This photograph was taken ... |
| Date: | 12 29 1930 |
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| Description: | International Harvester engineering department photograph of an experimental Farmall tractor. The original caption reads: "15-30 Farmall Tractor (redesigne... |
| Date: | 12 29 1930 |
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| Description: | International Harvester engineering department photograph of an experimental Farmall tractor. The original caption reads: "15-30 Farmall Tractor (redesigne... |
| Date: | 12 29 1930 |
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| Description: | International Harvester engineering department photograph of an experimental Farmall tractor. The original caption reads: "15-30 Farmall tractor (redesigne... |
| Date: | 1951 |
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| Description: | Nighttime elevated view of the S.C. Johnson Wax Company research tower, designed by Frank Lloyd Wright. |
| Date: | 1953 |
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| Description: | Trucks mounting a steep grade in the testing track at International Harvester's Phoenix Proving Ground. Opened in 1947, the proving ground was used by Inte... |
| Date: | 1953 |
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| Description: | View of International Harvester's Phoenix Proving Ground. Opened in 1947, the proving ground was used by International Harvester through the 1970's to test... |
| Date: | 1953 |
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| Description: | Stone displaying ancient writing. The rock was on the grounds of International Harvester's Phoenix Proving Grounds. Opened in 1947, the proving ground was... |
| Date: | 1953 |
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| Description: | International pickup kicking up dust on a dirt test track at International Harvester's Phoenix Proving Ground. Opened in 1947, the proving ground was used ... |
| 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: | 1953 |
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| Description: | Headquarters building for truck testing at International Harvester's Phoenix Proving Ground. Opened in 1947, the proving ground was used by International H... |
| Date: | 1953 |
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| Description: | International semi trucks mounting a long hill at International Harvester's Phoenix Proving Ground. Opened in 1947, the proving ground was used by Internat... |
| Date: | 1953 |
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| Description: | Aerial view of International Harvester's Phoenix Proving Ground. Opened in 1947, the proving ground was used by International Harvester through the 1970's ... |
| 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: | 1966 |
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| Description: | Aerial view of International Harvester's Phoenix Proving Ground. Opened in 1947, the proving ground was used by International Harvester through the 1970's ... |
| Date: | 1953 |
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| Description: | Bird's-eye view of International Harvester's Phoenix Proving Ground. Opened in 1947, the proving ground was used by International Harvester through the 197... |
| Date: | 09 19 1944 |
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| Description: | B.B. Stoller tending the University of Wisconsin mushroom garden in the "hole in the ground" which is a bricked and vaulted recess located in the hillside ... |
| Date: | 02 23 1945 |
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| Description: | Dorothy Johansson, research assistant in zoology at the University of Wisconsin, performing an experiment using white rats to check techniques being develo... |
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