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102 such a manner that no stock will be wasted. The measurements for the several pieces are taken from the elevation and are plainly marked. The pattern for the body piece, Fig. 140, is obtained by adding 3-inch double edges to the front elevation, and notching for a 1⅜-inch cleat as shown. The stretchout for the end piece is determined from the front elevation, and the width from the profile. Single edges ¼ in. wide are added to each side. The top is notched for a 1½-inch cleat.

48. Related Mathematics on Rectangular Pipe Offset.—Problem 25A.—How much would the stock cost for four rectangular pipe offsets, Fig. 137, made from No. 24 galvanized steel (1.156 lb. per square foot) if the steel cost $8.75 per 100 lb.?

Problem 25B.—How much more would the stock cost for the patterns shown in Fig. 140 than those shown in Fig, 139? Stock cut from body pattern corners would be regarded as waste.