Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . ter is poured into thegroove by a large number of men simultaneously, when the, fracture takes place through the whole Another mode was to bore perpendicular holes, 18 inchesapart, on the desired line of fracture; into these holes smallchisels were driven persistently from one end to the other by anumber of men, which resulted in a fracture along the line
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . ter is poured into thegroove by a large number of men simultaneously, when the, fracture takes place through the whole Another mode was to bore perpendicular holes, 18 inchesapart, on the desired line of fracture; into these holes smallchisels were driven persistently from one end to the other by anumber of men, which resulted in a fracture along the line. Metallic wedges inserted at a number of places and simul-taneously driven, was another mode. Wooden pins inserted into a row of holes and swelled byI water, was yet another method. The machine ()4) is desiiiued for cutting vertical or inclinedchannels in the stone lueparatory to nutting underand separating the blocks. The boiler, engine, andcutting mechanism are all mounted o]i the same car-riage, which is moved by toothed wheels geaiingwith a rack upon the rails. By means of a reversiblepawl, the carriage may be caused to travel in eitherdirection without reversing the engine. A Inction Fig.
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