Installment No. XX of a series on weaving from the British journal Engineering, dated April 2, 1875. It describes circular swivels ("circles"), small horseshoe-shaped shuttles moved by a rack motion to weave silk spots or figures on a ground cloth. It covers how they are mounted on the batten and operated by the Jacquard, and details the spring-tensioned bobbin and spindle. It closes with the older lappet needle-frame method of producing figures, including a gauze-like variant. Illustrated with engineering figures (Figs. 177-196).