File:Winnipeg Tractor Contests 1910. Prony Brake Dynamometers.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 12:00, 26 February 2009 | 2,975 × 2,392 (477 KB) | Pointillist | {{Information |Description={{en|1=Winnipeg Tractor Contests 1910. In the background are two tractors, the one on the left being mostly obscured. Each tractor is connected by a belt to a separate De Prony Brake Dynamometer in the foreground. From a scanne |
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