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BETTER CASTINGS with Mavyari PIC IRON, CERTAIN CASTING had a top section, A about 4 in. thick, which had to be machined. When an ordinary iron mix- ture was used a porous surface resulted, as shown at the left. The addition of a small percentage of Mayari to the cupola mixture eliminated this condition, and a casting was obtained with a smooth, dense surface, as shown at the right. This is a case where Mayari was used for its all-round improving effect. Cast- ings made with Mayari machine easily to a smooth, highly wear-resisting surface even on a thick section; they have a fine, close grain, and are free from blow-holes, spongy spots and other imperfections. There’s another highly important use for Mayari. It is a natural nickel- chromium alloy pig iron and offers a simple, economical method of making alloy- iron heat-resisting castings. In most cases it takes only a small percentage of Mayari to impart the de- sired properties. Engine and pump cylinders, piston rings and similar cast- ings can be made sounder and longer wearing, grate bars and other furnace parts can be made to stand the heat better, at very moderate cost, by using Mayari Pig Iron in the mixture. ee BETHLEHEM STEEL COMPANY, BETHLEHEM, PA. oe District Offices: New York, Boston, Philadelphia, York, Wilkes-Barre, Baltimore, Washington, Atlanta, Pittsburgh, Buffalo, Cleveland, Cincinnati, I ndianapolis, Detroit, Chicago, St. Paul, Milwaukee, St. Louis, Houston, Dallas. Pacific Coast Distributor: Pacific Coast Steel Corporation, San Francisco, Los Angeles, Portland, Seattle, Honolulu. Export Distributor: Bethlehem Steel Export Corporation, New York. “Who's Who” on the Great Lakes The Great Lakes Red Book is a vest pocket directory of the Great Lakes Vessel Trade It contains a list of all the vessels plying the Great Lakes and tells the names of the owners, the captains and the engineers. Contains a separate list of the ore carriers showing the capacity of each. It’s the only vest pocket directory of 1934 Edition mates. the vessel trade of the Great Lakes and is a valuable handy reference book both for the salesman calling on his trade and the captain, engineer or sailor who wants to keep in touch with his former sailing ONLY $1.00 A COPY INCLUDING DELIVERY Send in your order NOW direct to Book Department The Penton Publishing Co. 1213-35 W. 3rd St. Publishers of MARINE REVIEW MARINE REVIEW—July, 1934 Cleveland, Ohio 209-M 39