method of mending, but I do not know of any other which can be so
readily applied with the same effect. If another length of hose can be
substituted for the leaky one it is better to do so; but that is not
always at hand, nor does it always happen that time can be spared for
the purpose.

_Four Lengths of Suction-pipe._--These are generally made of leather,
riveted tightly over a spiral worm of hoop-iron, about three-quarters
of an inch broad, a piece of tarred canvas being placed between the
worm and the leather. They are usually made from six to eight feet
long, with a copper strainer screwed on the farther end, to prevent as
much as possible any mud or dirt from getting into the engine with the
water. It is of advantage to carry four lengths of suction-pipe, as
they can be joined to reach the water; if one is damaged the others
will still be serviceable.

The suction-pipes are more troublesome to rivet than the common hose,
and are done in the following manner:--After the joints are fixed on
the spiral worm, and it is covered with the tarred canvas, an iron
mandrel longer than the worm is put through it, the edge being rounded
to the circle of the inside of the worm. The projecting ends of the
mandrel are supported to allow the worm to lie quite clear. One end of
the mandrel has a check, that the brass joint may not prevent the worm
from lying flat on the mandrel. The leather is then put over the worm,
and the rivets being put into one side, a small thin mandrel is laid
over the canvas and the rivets struck down upon it. If the small
mandrel be not used the heads of the rivets are apt to lie unequally
on the worm.

_Three Wrenches for Coupling-joints._--These are for tightening the
coupling-joints, when that cannot be sufficiently done by hand. When
the hose are all put together a man is sent along the whole line with
a pair of wrenches to tighten such of the coupling-joints as require
it. The wrenches are generally made with a hole to fit the knob on the
coupling-joint, and, when used, are placed, one on the nob of the male
and another on the nob of the female-screw, so as to pull them in
opposite directions.

_Two Branch Pipes._--These are taper copper tubes, having a
female-screw at one end to fit the coupling-joints of the hose, and a
male-screw at the other to receive the jet pipes, one is 4 feet long
to use from the outside of a house on fire, the other 12 inches for
inside work.

_Three Jet-pipes_ or