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Scientific American, Vol. 37, No. 21 (November 1877) (1877)

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An illustration from Scientific American, Vol. 37, No. 21 (November 1877), 1877, leaf 0
e of plied as fast as it is required. seven months. The rock is gneiss and quartz, and the ma- vantages attending the use of the latter underground. In The principal point in the construction of the Rand drill so confined a space, where there is no exit for the exhaust chinery employed is the Band… … THE 42D STREET SEWAGE TUNNEL, NEW YORK CITT. © 1877 SCIENTIFIC AMERICAN, INC

Patents · Melting · Iron · Cupola · Obelisk · Melting point · Address · Three miles · Portable flouring · Scientific American · Intense heat · Spirit level · Fire proof · Professor lister · Sewing machine · Large number

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