An Exposition

Three vast floors of the Grand Central Palace, New York, were filled to bursting with the various exhibits of the Ninth Annual Exposition of Chemical Industries. Lecture courses by prominent chemists were given on Plant Equipment in the Chemical Engineering Industries, Materials of Construction, Chemistry in Commerce. Classes of students from nearby universities were personally conducted by their professors. The General Electric Co. showed an automatic welding apparatus and an electric steam generator. The Anaconda Copper Co. demonstrated methods of roasting sulphurous copper ore to secure by-product sulphuric acid, with which superphosphate fertilizers are made. Eimer & Amend, instrument manufacturers, displayed a photomicrographic camera, to be attached to an ordinary microscope. The Research Corporation, organized to market new inventions, exhibited an electric precipitator for dried milk and a caterpillar drive adjustable at any time, for getting automobile trucks out of ditches. The Universal Oil Products Co. demonstrated its process for " cracking" gasoline from heavier oils, such as kerosene.