schools, by request, are conducted through the plant. They are shown chemical and smelting departments where oxides of all colors and shades are made for the iron enamel trade; the mill or grinding rooms where colors are made and mixed for the pottery, glass and other decorating trades; the”gold . v v mn room where pure gold is converted into form;for use on gold encrusted ware; and the heavy stamp and polishing” rooms A corner in the Bronze Powder Room. Intermediate process. 0. Hommel Co., Carnegie, Pa. where copper, zinc and aluminum are made into gold and silver bronze powder. In addition many visitors come annually from other states and from foreign lands to visit the factory. The ccmpany’s close association with other factories in this country and in Europe places it in a pesition to furnish art decorations, potteries, glass factories and iron enamel works with tools and supplies of every nature required and of the best quality. Not the least among these are porce- lain grinding balls and lining bricks used in mills for grinding enamel, color and dry earth powder of every kind: and erind-