ABSTRACT
SO-CALLED animal by-products used by the Tenderers and con sisting of excess fat, bones, hoofs, and offal have long been useful to man. Tallow was probably used prehistorically for lighting and softening and waterproofing garments. Although soap making be gan many thousands of years ago, tallow candles were in wide spread use by the common people before tallow-based soap. Toward the latter part of the nineteenth century, an industry that evolved transformed by-products into fertilizer.
