An International Correspondence Schools instruction pamphlet (Serial 509) on designing spot weaves. It explains how to lay out spots in plain, satin and broken crow order on design paper and how to choose and fit ground weaves, covering both warp-spot and filling-spot weaves, including corkscrew and cord grounds. It then treats spots formed by an extra warp or extra filling, with tying of floats, stripe spot effects, and harness and chain drafts. Practice examples follow each section, and many pages carry design-paper drawdowns and drafts.