Inside Out Library · Explore

Scientific American, Vol. 89, No. 3 (July 1903) (1903)

leaf 3

An illustration from Scientific American, Vol. 89, No. 3 (July 1903), 1903, leaf 3
r pulleys at the top.of the drill. When it is desired to re- are disposed as follows: The flexible shaft is con- move the core, coarse gravel is poured down the hol- tinuous with the shaft, B, the crank of which works low tubes, which wedges in between the core and core within the expanded portion… … CORES DRILLED THROUGH BRICK iron w h ' c h the shot into the rock, thus gradually wearing it away, AND CAST IRON BY THE STEEL formed part of or to be more correct the action of the shot on the SHOT PROCESS. the structure. Fig. 3.—THE HAMMER AND IIS TOOL. *ock is one of crushing rather than…

Munn · Motor · Gas · Scientific American · Automatic · Gas engine · Foot passengers · Horse power · Printing press · Years ago · Motive power · Shot bit · Slot machines · American supplement

Internet Archive · Public domain (published before 1931). Free to use for anything.

More pictures from Scientific American, Vol. 89, No. 3 (July 1903)

More like this