A 1929 article from The Melliand by Josef Funke on how the direction and amount of yarn twist interact with weave structure to affect the look of a woven fabric. It explains how light reflects differently from right- and left-twist yarns, why yarns bow or deviate from straight lines in floats, honeycomb, mock leno and huck weaves, and how warp and filling twist relationships affect beating-up. It ends with how twill and gabardine constructions can control tilting of floats. Illustrated with numbered figures, including twill and other weave drawdowns.