A 1929 trade article by C. E. Williams on the latest woolen mule spinning machine and its use in the spinning room of a woolen mill. It covers the qualities wanted in woolen yarn, how mules are adapted to different stock (carpet, asbestos, blanket and others), and the modern construction features of the 1929 mule. It also describes the head mechanism and quadrant mechanism in detail, with eight illustrations of the machine and its parts. A short note on long draft spinning follows the article, which ends "To Be Continued".