Report on the building and ornamental stones of Canada (1912)
Parks, William A. (William Arthur), 1868-1936, Canada. Mines Branch (1901-1936) · Ottawa : Dept. of Mines, Mines Branch · leaf 140
so until sufficie?itly reduced. Tlie finish produced by the Iubbing bed issufficient iov outside work in nmi-ble and is kn(nvn as the sand finish. … Fig. 4. Overhead ruhliinc hed. Gritting and Polishing Machines. For further snioothiuii-. the stone is taken from the rubbing lieds to thegritting machines and thence to the polisliers. Whether for granite or formarble the construction of all the.xe machines is much alike, but the weightand…
Building stones · Geology, Economic · Stone industry and trade
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
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