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.
Smock-Frock. A garment of coarse linen, resembling a short shirt in shape, worn by field-laborers over their other clothes; similar to the French blouse. The yoke of this garment is at its best elaborately shirred or puckered.