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Scientific American, Vol. 38, No. 14 (April 1878) (1878)

leaf 3

An illustration from Scientific American, Vol. 38, No. 14 (April 1878), 1878, leaf 3
, not merely of a few large centers of popula- an arrangement of steam passages in the valve, and ports- tion, but for the advantage of the general body of the nation. The accompanying illustrations represent a combined ven- and passages in the valve casing, by means of tilator and chimney, which,… … gether wherever the joints of either may lap, manner. COMBINED VENTILATOR AND CHIMNEY. An improved Gang Wood Saw, making one strengthens the other, and a greater dura- © 1878 SCIENTIFIC AMERICAN, INC

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