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 144
Pneumatic Surfaeius Machine. … !)1 saw, except that the work is carried aj;ainst the saw on a platten actuatedby worm ;uid i-ack. The saw blade may be plain or provided with insertedteeth acconliiiji to ihc tiatui-c of the material to l)e cut. The Carborundum Wheel Machine. A recent improvement in stone woikinfi machinei-y,…
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.
