ALEX BARTEL / SCIENCE PHOTO LIBRARY. ALEX BARTEL / SCIENCE PHOTO LIBRARY.
Steam traction engine, photographed at a steam rally in England. Traction engines were widely used in farming & engineering until the advent of the internal combustion engine. Their uses on the farm included providing power for a variety of implements, including harvesters & threshing machines. Civil engineering projects, such as bridge & road building required them for transportation of men & materials (they frequently towed large trailers); adaptions of the basic traction unit included road rollers, steam shovels, diggers & tractors.
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