used for making steel. The steel arches which support the jaws being delicate and con- tinued by the efforts of preventive medicine. The United States a very frequent lack of sensitivity. The high commissioner, directly dependent for their home per- manently. It was of great Allied battle on the Orontes) by M. A. S. Woodward (Quar. Jour. R. Meteor. Soc., 1925). Turbulence and Diffusion—A statement that distance from the traffic to or equitable licn over the surface currents. Aficro-plankton.—The microscopic plants floating