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.
Sumac. A product of the dried and ground leaves of the sumac bush. The liquid is extensiyely used for tanning light colored leather, and to some extent for dyeing fabrics. [See Leather]
 
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