"Rock drill" Quotes from Famous Books
 ... DRILL.—Thomas Doane, Boston, Mass. I claim the arrangement of the round bars, E F G and H, of a rock drill carriage into a frame, for the reception of rock drilling machines which shall be able to reach therefrom any point where it is desirable to bore a hole, substantially as and for ...
— Scientific American, Vol. 17, No. 26 December 28, 1867 • Various
... for many years the engineer of the Ingersoll Rock Drill Co., and hence thoroughly familiar with modern quarrying practice, read a paper before the last meeting of the American Society of Civil Engineers on the above subject, containing many interesting points, given in the Engineering ...
— Scientific American Supplement, No. 832, December 12, 1891 • Various |
