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.
Foot. A unit of length, originally the length of a man's foot. The English foot, which is in use in the United States, contains 12 inches. The feet in use in different European countries before the introduction of the metric system varied from 9 to 21 English inches. The ancient Roman foot is know to have been 11.65 English inches. Other ancient feet are of uncertain length. A foot of grindstone was formerly 8 inches. [See Metric System, Cloth Measure, Ell, Aune, Fold, Metre, Measures]