Installment of the "Fabric Analysis" series from Posselt's Textile Journal, November 1921, on testing yarns and fabrics for moisture (conditioning). It explains the hygroscopic nature of fibres, over-conditioning of purchased yarn, oven-drying test procedure with temperatures and timing, and regain calculations for cotton, wool, silk, flax and union fabrics. Includes a few trade advertisements and a list of Textile Publishing Co. books.