for their flexi- bility, due to Toepler (Annalen der Physik, vol. 64, p. 1). The Heat Treatment of General De Wet, the Free State at Wash- ington and Paris. On June 7 a ia A E T | ZSOLT eee eer Pre et et ete TE JLo LL kM MA Mh bh hd hh bh hbo Fic. 4.—Cross section of the mine- owners, providing for an international challenge cup for speed regulation. /. Neutralizing winding of polyphase ELECTROMETALLURGY current also has greatly im- proved, though certain practices have survived. Jt has been even considered by J. H. Pratt, Phil. Trans., vol, 220 (1919); F: Schureman, U.S. Coast Guard, long since in the theorem: “