Threshing Stone history. The in depth study of the threshing stone, the tool used to thresh wheat grain from the straw. Used by Mennonites in Russia and briefly by Mennonites in Kansas. Book includes how the stone was used to thresh wheat, history of cereal grains, threshing history, making the stone, geology, Russian/Mennonite history, the railroad, picking Kansas, farming with horses, first person stories, symbolism, objects and description of finding about 100 threshing stones in North America. Over 500 photographs and footnotes included.