The Operation, Care, and Repair of Farm Machinery Twenty-Fourth Edition

258 pages plus pages for memoranda on this hardback book measuring Eight inches by Five and a half Inches. Issued by John Deere in this twenty-fourth Edition with no publication date but it must have been the early 1940's or late 1930's. There are a lot of useful tipsin this book, like how to measure ear corn in a corn crib when all you know is the volume of the corn crib. The number of tons of hay in a hay mow. To find the width of a 4-ply belt required to transmit a given horsepower at a given belt speed per minute. Where else can you find information as vital as this to run your farm?