Quarries Economics, Methods, Stone Types, Equipment and ...
Stone Quarrying by Machinery (October 1884) (This article includes a sketch of "Saunders'' Improved Ingersoll Channeling Machine" and another of a "gang of drills.") The Manufacturer and Builder, Vol. 16, Issue 10, October 1884, pg. 226. (Article in digital images viewed at American Memory, Library of .