This is an online edition of the classic technical reference Five Hundred and Seven Mechanical Movements by Henry T. Brown. This site contains the original illustrations and text from the 21st edition of the book, published in 1908. It also includes animated versions of the illustrations, and occasional notes by the webmaster. The animated versions are not yet complete. They are identified by color images in the thumbnail pages. To keep up with developments on this site, use the Twitter Follow or Facebook Subscribe links below.