A single page from the magazine Textiles, from W. Scott Taggart's series on the mechanics of textile processes. It covers centers of gravity and balancing of pulleys, worked lever-moment problems (a weighted lever and a safety-valve lever), and the concepts of mechanical advantage and velocity ratio for levers. The foot of the page continues a 'Straight Line' textile calculations table of yarn count conversions from the metric number to Yorkshire, denier, dram, jute and grains-per-length systems.