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Scientific American, Vol. 55, No. 15 (October 1886) (1886)
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d, and its botton withdrawn, its contents falling into each block containing twelve longitudinal apertures, mixing tanks on the lower floor. Melted pitch is fed the mould. After six or eight inches have been filled, in the same general way into the same vats, and the 3J^ inches in diameter. Each of… … THE ELECTRIC SUBWAT CONDUIT IN NEW TORE. © 1886 SCIENTIFIC AMERICAN, INCPatents · Patented · Air · Munn · Scientific American · Machine · Hind limbs · Danger signal · Machine gun · Sheet metal · Express money · Mouse bird · Address munn · Baggage car · Skilled labor
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