Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 709
678 ROCK-DRILLS. … ROCK-DRILLS. 679 able carriages running on transverse ways. The scow, after being floated over the rock to be bored,is lifted bodily out of water if need be, by spuds which are forced down against the rock, thusforming an immovable platform. Fig. 3696 shows the scow used in the improvement of the…
Mechanical engineering -- Dictionaries
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