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Uptake

UPTAKE.

The area of the uptake, like the area of the tubes, is made about 4_ tog of the area of the grate. We find that g of the grate surface is 432 square inches. If we make the uptake 12 inches deep measured with the length of the boiler, it will be 432 12 = 36 inches wide. The opening of the shell at the front end will be 12 inches deep and the plate cut down until it is 36 inches wide.