Steam-driven harvesting, early 1900s. A considerable group works by using threshing devices belted to steam-powered traction engines to system mountains of wheat. Animals were nevertheless being used to haul the wagons. Note the modest tenders of coal staying towed with the traction engines. Courtesy of Library of Congress. Bike trailers http://bcstractorforsale.blogofoto.com/25310908/new-step-by-step-map-for-accuweather-canandaigua