Fourth article in a series on weaving from the periodical Engineering (1874). It explains that hand and power looms work on the same principles and describes plain weave, the difference between warp and weft yarns, and silk terms (tram and organzine). Most of it covers warping: peg warping as still done in India, the lease or cross, the warping mill with its heck, and beaming the warp with a comb. Illustrated with line figures (Figs. 8-18); no weaving drafts.