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Now you must make two supports, or “head blocks” for this. Cut from two-inch-thick hard wood two pieces like Fig. 2. The square hole is for the gas pipe to go through and must have a bearing fitted into it. Of course it would be easier to cut just a round hole slightly larger than the pipe for it to turn in, but this bearing, with much turning, would wear loose. So a one-inch square hole is cut; the gas pipe, with a piece of newspaper wrapped around it, is held in the exact center of the hole, the head block standing upright; and melted Babbitt metal is poured down through the hole in the top of the block. To do this pieces of cardboard should be fitted over the pipe and tacked to either side of the block, so that the space inside is like a mold. The metal which remains in the top hole forms a key to hold it. The Babbitt metal may be bought at a hardware store in small bars and melted in a kettle in the fire. It hardens quickly and when hard, the pipe may be removed, the paper taken off and you will have a permanent, durable bearing.