A short encyclopedia article on the hydraulic cotton-compress, a steam-powered press used to bale cotton for cheaper shipping and storage. It describes the machine's construction (three hydraulic cylinders, cross-head, platens), its high- and low-pressure steam cylinders and rams, the 3000-ton pressure and the 500-pound bale it produces, and a capacity of 100 bales per hour. A plate engraving of the Miller & Bierce press (Philadelphia) accompanies the text.