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.
Knitting Cotton. A loosely twisted cotton yarn used for darning purposes, the knitting of hose, tidies and other fancy articles. It is numbered from 8, coarse, to 20, fine, and is put up sixteen balls in a box, each box containing two pounds.