A short dictionary entry defining the pattern-card of a Jacquard loom: a perforated card through which the needles pass, with holes arranged according to the pattern. It explains how the cards, hung in an endless belt, revolve over a perforated box so that rods drop where holes coincide and each rod lifts its warp-thread. Illustrated with an engraving (Fig. 3569) of the pattern-cards and pattern-box detached from the loom.