itted to touring automobiles. This is
carried sufficiently high to offer complete protection to his head when
seated at the wheel, while through a small orifice in this shield he is
able to obtain a clear view of the road. The engine and its vital
parts are also adequately protected. The ammunition is carried in a
cupboard-like recess forming part of the driver's seat, encased in
bullet-proof steel sheeting with flap-doors. This device enables the
shells to be withdrawn readily from the side of the car and passed to
the crew within the turret. The caisson is of sufficient dimensions to
receive 69 shells.

The Ehrhardt airship fighting ordnance is similarly adapted to motor-car
operations, one type being especially powerful. The whole of the vehicle
is encased in armour-plating impervious to rifle and machine-gun fire.
The driver is provided with a small orifice through which he is able to
obtain a clear uninterrupted view of the road ahead, while the armouring
over the tonneau is carried to a sufficient height to allow head-room to
the gun crew when standing at the gun. All four wheels are of the disk
type and fashioned from heavy sheet steel. The motor develops 40-50
horse-power and, in one type, in order to mitigate the risk of
breakdown or disablement, all four wheels are driven. The gun, a small
quick-firer, is mounted on a pedestal in a projecting conning-tower. The
mounting is placed behind the driver's seat, and is trained and operated
from the tonneau. The maximum elevation is 75 degrees, and like the
gun carriage bearing the tube guide it can be moved through a complete
circle, being free to rotate in the fixed pivot jack to enable this end
to be attained.

The foregoing may be said to represent the most powerful types of mobile
anti-aircraft weapons used by the Austro-German forces to-day. Arms of
similar design, roughly speaking, have also been introduced into the
French and Russian services. In addition many semi-armoured weapons
of this character are in operation, some specially built for the work,
while others have been improvised. In the semi-armoured motor-car the
carriage follows the usual lines; it has an open top, the armouring
comprising the body of the tonneau and the diskwheels, which are made of
light bullet-proof steel. Here again the prevailing practice is to mount
the gun as nearly above the rear axle as possible, and to work it from
the tonneau. The maximum elevation is also 75 degrees, with