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May, 1918 clude a 16-inch stroke shaper, which is used for planing valve seats and various other operations, including all kinds of small work; a sensitive drill. for high-speed drilling; an emery grinder with surface grinder attach- ment for grinding castings and tools; a portable, elec- tric-driven boring bar for boring out the main engine valve chest and high-pressure cylinder; threading ma- chines with capacity for pipe up to 6 inches in diameter, and work benches and hand vises. Fig. 1 shows the brazing of flanges on a copper pipe which is to be used in the battleship heating system. The coppersmith shop is provided with a portable cop- persmith forge and blower which are employed for all kinds of brazing, patching, pipe bending, rebabbitting of bearings, etc. Adjoining it is a small room equipped with bending rolls and a beading machine for making THE MARINE REVIEW 183 air ducts, pipe coverings, tanks for motor boats, etc. Fig. 2 shows the foundry. This departmnt is equipped with an oil-burning crucible furnace, having capacity for 200 -pounds per heat; and with a combination sand bin and coremaker's bench, and all necessary molding equipment. It is provided with a stock of ingot brass and aluminum which, in conjunction with the scrap con- stantly accumulating aboard the vessel through the re- jection of worn-out parts, is sufficient for all castings requirements. The castings most frequently made are valve seats, valve disks and other valve parts, and vari- ous pipe connections, such as tees, wyes, etc. Adjoining the foundry is the blacksmith shop which is equipped with forge, electric blower and anvil for producing hand forgings. A complete stock of metalworking tools is provided. galvanized copper gasoline