Bull. U. vS B. F., 1917-18. 



Plate XXXVI. 



Fig. I. — The original foot- power lathe employed by ]\Ir. Boepple in the inauguration of the fresh- water 



pearl-button industry. (See p. 65.) 



Fig. 2. — A modem automatic machine for shaping and drilling buttons. (See p. 75.) 



