A looseleaf draft book by Ada K. Dietz, issued by the Little Loomhouse in 1949, explaining how to write weaving threading drafts from algebraic expansions such as the square and cube of a binomial, the square of a trinomial, and larger polynomials. Each page is coded (e.g. AKD-2-2-O-1) and gives the equation, the harness values assigned to x, y and z, threadings, treadlings, yarns and sett. The weaves covered include plain weave, overshot, lace, twill, summer and winter, and crackle. Photographs show finished pieces such as evening bags, a dress, shirts, scarves, a rug, chair upholstery and a knitting bag, along with the weavers at work.