al lines of construction.
The body of the car is sheathed with steel plating which is bullet proof
against rifle or even shrapnel fire. The car is designed to carry two
persons; the seats are therefore disposed tandem-wise, with the observer
or gunner occupying the front seat.

The defensive armament is adequate for ordinary purposes. Being fitted
with a 100 horse-power motor, fairly high speeds are attainable,
although the velocity is not equal to that of machines constructed upon
conventional lines, inasmuch as there is an appreciable increase in
weight.

The car is short and designed upon excellent stream lines, so that the
minimum of resistance to the air is offered, while at the same time the
balancing is perfect. The sides of the car are brought up high enough
to protect the aviators, only their heads being visible when they are
seated. The prow of the car follows the lines generally adopted in high
speed torpedo boat design; there is a sharp knife edge stem with an
enclosed fo'c's'le, the latter housing the gun.

Another craft, designed for scouting operations, may be likened to
the mosquito craft of the seas. This machine, while a biplane like
the military aeroplane, is of lighter construction, everything
being sacrificed to speed in this instance. It is fitted with a 100
horse-power motor and is designed to carry an observer if required.
There is no offensive armament, however. The fuel tank capacity,
moreover, is limited, being only sufficient for a two or three hours'
flight. While this is adequate for general reconnoitring, which for the
most part entails short high speed flights, there are occasions when
the Staff demands more prolonged observations conducted over a greater
radius. This requisition can be met by eliminating the observer, whose
duties in this instance must be assumed by the pilot, and substituting
in place of the former, a second fuel tank of sufficient capacity for a
flight of four or five hours, thereby bringing the term of action in the
air to about 6 1/4 hours. This machine travels at a very high speed and
is eminently adapted to its specific duty, but it is of limited service
for general purposes.

The arming of an aeroplane, to enable it to defend itself against
hostile attack or to participate in raiding operations upon the aerial
fleet of the enemy, appears to be a simple task, but as a matter of
fact it is an undertaking beset with difficulties innumerable. This is
especially t