A 1872 article on card clothing, the wire-toothed leather strips used to cover carding cylinders in cotton and wool mills. It traces card-making from hand-cards to machine production in the United States, with early inventors such as Nathaniel Niles, Oliver Evans, Crittenden and Amos Whittemore, and the early use of dog power in Worcester County, Massachusetts. The second half describes the Sargent Card Clothing Company of Worcester, how its tooth-setting machines work, and its daily output compared with the national total.