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Adam Badeau, Grant in peace: from Appomattox to Mount McGregor, a personal memoir 185 23 Browse Search
Cambridge History of American Literature: volume 3 (ed. Trent, William Peterfield, 1862-1939., Erskine, John, 1879-1951., Sherman, Stuart Pratt, 1881-1926., Van Doren, Carl, 1885-1950.) 18 0 Browse Search
Thomas Wentworth Higginson, Book and heart: essays on literature and life 10 0 Browse Search
The Daily Dispatch: February 20, 1861., [Electronic resource] 7 5 Browse Search
Thomas Wentworth Higginson, Atlantic Essays 6 0 Browse Search
Southern Historical Society Papers, Volume 9. (ed. Reverend J. William Jones) 4 0 Browse Search
Charles E. Stowe, Harriet Beecher Stowe compiled from her letters and journals by her son Charles Edward Stowe 4 0 Browse Search
Eliza Frances Andrews, The war-time journal of a Georgia girl, 1864-1865 2 0 Browse Search
William Schouler, A history of Massachusetts in the Civil War: Volume 1 2 2 Browse Search
Knight's Mechanical Encyclopedia (ed. Knight) 2 0 Browse Search
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Knight's Mechanical Encyclopedia (ed. Knight), R. (search)
The former is now universally used in operations on a large scale, as at the Mont Cenis and Hoosac tunnels, and is extensively employed in coal-mining, serving to ventilate the shaft besides performing the functions of a motor. The drilling-machines to which it is applied are various, very great improvements having been made within the past 20 or 25 years, previous to which time the old systems of turning the drill, and boring or pounding by hand, held undisputed sway. In 1849, Clark and Motley, in England, invented a machinedrill, and in 1851, Fowle devised a similar machine, having the drill directly attached to the piston cross-head and provided with an automatic feed-apparatus. To this succeeded the Hotchkiss and Gardner machine. It has an automatic feed, and the drill is air-cushioned to deaden its shock, enabling it to be worked very rapidly without injury to the stationary parts. The Mont Cenis and Hoosac tunnels gave a great impetus to this class of inventions, among w