Threshing is the act of beating or rubbing of a ripe crop together to separate the grain from the husks and straw. Threshing was a long tough job that up until 1905, was done by hand. Most farmers could not afford their own steam threshing machine, so they hired the steam thresher man to come. He showed up with his steam traction engine and separator to do the threshing. The machine made the job easier.