This section is from the "A Complete Dictionary of Dry Goods" book, by George S. Cole. Also available from Amazon: A complete dictionary of dry goods and history of silk, cotton, linen, wool and other fibrous substances,: Including a full explanation of the modern processes ... together with various useful tables.
Cockle. [Derived from cockle-shell, which is a variety having wrinkles or crimps over its surface] A term in trade signifying to pucker or contract into wrinkles; to rise into frequent uneven ridges or puckers. Often used in reference to worsted or mohair fabrics when wet.