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.
Catgut. A sort of linen canvas with wide interstices. The intestines of sheep, dried and twisted, used for strings to violins and guitars. The popular supposition that these strings are made of the gut of cats, is erroneous.