Engraved cross-section of the simple cylinder by J. I, 1910. Case Threshing Machine Company, from the book 'Farm engines and how to run them' by James H. Stephenson. Courtesy Internet Archive. ()This image was created from the Internet Archive Books Images project (https://www.flickr.com/photos/internetarchivebookimages/) through a collaboration between the Internet Archive and Gado Images. The descriptions and keywords from this image were created by Gado Images' professional research team.