This Di-op-Hammer is made under the Goulding & Cheney patent,
with F. A. Pratt's improvements. It has borne the test of a large
practice successfully, is a convenient substitute for the trip or steam-
hammer, and is also an efficient drop-hammer. The drop is raised by
means of a flat-surfaced strip of tough wood, which engages with the
faces of finished cast-iron rolls, driven by gears at the ends. One of



326 AMERICAN BKEECH-LOAUING SMALL AKMS.
