Book excerpt: This guide to the identification of old farm equipment has been assembled to help those who have grown up since the horse-to-tractor farming conversion identify the myriad of horse-powered farm implements still to be found. The identification process is simple and quick, and is based on the presence or absence of such readily recognizable features as wheels and teeth. Photographs and identifying features of essentially all of the types of equipment used in the United States during the early part of the twentieth century are included.