c. Late 1910s Aultman-Taylor 30-60 Tractor

 This tractor (serial #2044) was made by the Aultman & Taylor Machinery Company in Mansfield, Ohio. The Aultman-Taylor 30-60's Nebraska Tractor Test was #30, performed from June 30th to July 20th, 1920. You can view this test as a pdf here. The tractor that was tested (serial #3455) performed at more than 58 HP at the drawbar and 80 HP on the belt wheel, well above the advertised horsepower.

 Weighing about 24,450 pounds, Stuhr Museum's Aultman-Taylor was reportedly purchased in Chapman, Nebraska, a town in Merrick County, about we miles northeast of Grand Island. If you want to see a video of another Aultman-Taylor 30-60 in action, click or touch here. An incredibly detailed history of Aultman-Taylor's history is provided by Farm Collector on its website. You can access Part X of the history, which talks about the development of the company's steam engines and tractors, by clicking or touching here. On the first page you will find links to the first nine parts of this lengthy history written by Lorin E. Bixler and originally published in 1967.

From Tractor and Gas Engine Review,
vol. 15, no. 12 (December 1922).