Harvester-thresher and tractor being used to harvest crops. This agricultural machine is a McCormick harvester-thresher built by the International Harvester Company of America, Chicago, USA. The McCormick Harvesting Machine Company became part of the International Harvester Company in 1902, and the history of the McCormick designs date back to the 1834 patents by the US inventor Cyrus McCormick (1809-1884). This photograph is from a collection of unpublished images, dating from the 1860s to the 1920s, taken for 'The Pageant of America: A Pictorial History of the United States' (1925-1929).