The building and ornamental stones of North Carolina (1906)
Watson, Thomas L. (Thomas Leonard), 1871-1924, Laney, Francis Baker, 1875-1938, Merrill, George P. (George Perkins), 1854-1929 · Raleigh, [N.C.] : E.M. Uzzell, Public Printer · leaf 340
break. Into each of these is then fitted two METHODS OF QUARRYING AND WORKING STONE. 247 wedge-shaped half-round pieces of soft iron, called feathers, and a smallsteel plug or wedge placed between. The workman then moves alongthis line striking each wedge in turn until they all bind alike and… … Fig. 7.—Wardwell double-gauge channelling machine. fair to be very successful, Fig. 6 (see description of Mt. Airy quarries,p. 157). The surface of the stone is worked down by hand implements, such asthe point, chisel, tooth chisel, pitching chisel, drove, axe or pean ham-mer, and the patent or…
Building stones · Quarries and quarrying
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