eive a torpedo attack." Press keys 5, 3, 4, 8, and the
lights of lamps 5, 3, 4, 8, successively blaze out.

Electrical launches have been used to some extent, their storage
batteries being first charged ashore or on board the ship to which the
launch belongs. They have carried hundreds of people, and have made eight
knots an hour. The improvement of storage batteries, steadily going on,
will eventually cause the electrical launch to replace the steam launch.
One of its advantages is in having no noise from an exhaust and no flame
flaring above a smoke pipe to betray its presence. In warfare two sets of
storage batteries should be provided for launches, one being recharged
while the other is in use.

Mr. Gastine Trouse has recently invented "an electric sight," a filament
of fine wire in a glass tube covered with metal on all sides save at the
back. The battery is said to be no larger than a man's finger, and to be
attached to the barrel near the muzzle by simple rubber bands, so
arranged that the act of attaching the battery to the barrel
automatically makes connection with the sight; and so arranged also that
the liquid of the battery is out of action except when the musket is
brought into a horizontal position for firing.

To throw a good light upon the target the same inventor has devised a
small electric lamp and projector, which is placed on the barrel near the
muzzle by rubber bands, the battery being held at the belt of the
marksman, with such connections that the act of pressing the butt of the
musket against the shoulder completes the circuit, and causes the bright
cylinder of light to fall on the target, thus enabling him to get as good
a shot as in the day time.

Search lights and incandescent lights are advantageously used with
balloons. In submarine boats electricity will one day be very useful.
Submarine diving will play a part in future wars, and the diver's lamp
will be electrical.

Progress has been made also in constructing "electrical guns," in which
the cartridge contains a fuse which is ignited by pressing an electric
button on the gun. A better aim can be had with it, when perfected, than
with one fired by a trigger. At present, according to Lieut. Fiske, this
invention has not reached the practical stage, and the necessity for a
battery to fire a cartridge is decidedly an objection. But the battery is
very small, needs little care, and will last a long time. The hard pull
of the ordinary trig