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Scientific American, Vol. 28, No. 15 (April 1873) (1873)

leaf 7

An illustration from Scientific American, Vol. 28, No. 15 (April 1873), 1873, leaf 7
HIGH STEAM GAGE. The high steam alarm, Fig. 1, is inserted in the upper shellof the boiler, and communicates with its interior at A. Bis a brass tube, the lower part of which is surrounded by apipe, C, of non-conducting material, and is hermetically | RADIAL DRILLING MACHINE. bottom, and in the…

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