Encyclopedia article on steam compression of cotton bales for shipping, explaining why density matters for freight and stowage. It describes Tyler's early steam press, Grader's Standard Compress, and Capt. S. H. Gilman's Champion Compress in New Orleans with dimensions, valve gear, boilers and a table of daily performance data. It also covers steam bale-band tighteners, the grip-tie, and the doubling of bales, with examples of ship cargo gains.