greater degree.

As it is impossible in the limits of this paper to describe all the
forms in which the movable fulcrum hammers have been arranged, two types
only will be selected taken from actual work; namely, a small planishing
hammer, and a medium-sized forging hammer.[1]

[Footnote 1: To the makers, Messrs. J. Scott Rawlings & Co, of
Birmingham, the author is indebted for the working drawings of these
hammers.]

The small planishing hammer, Figs. 1 to 3, next page, is used for
copper, tin, electro, and iron plate, for scythes, and other thin work,
for which it is sufficient to adjust the force of the blow once for all
by hand, according to the thickness and quality of the material before
commencing to hammer it. The hammer weighs 15 lb., and has a stroke
variable from 21/2 in. to 91/2 in., and makes 250 blows per minute. The
driving shaft, A, is fitted with fast and loose belt pulleys, the belt
fork being connected to the pedal, P, which when pressed down by the
foot of the workman, slides the driving belt on to the fast pulley and
starts the hammer; when the foot is taken off the pedal, the weight on
the latter moves the belt quickly on to the loose pulley, and the hammer
is stopped. The flywheel on the shaft, A, is weighted on one side,
so that it causes the hammer to stop at the top of its stroke after
working; thus enabling the material to be placed on the anvil before
starting the hammer. The movable fulcrum, B, consists of a stud, free to
slide in a slot, C, in the framing, and held in position by a nut and
toothed washer. On the fulcrum is mounted the socket, D, through which
passes freely a round bar or rocking lever, E, attached at one end to
the main piston, F, of the hammer, G, and having at the other extremity