of lung wounds, the projectiles did not have
velocity enough to completely traverse the body and come out.

In 71 cases of joint wounds, 66 were due to low velocity shrapnel and
only 5 to high velocity bullets. Practically every one of these wounds
could have been prevented by breast and body pieces and knee and elbow
caps of armor.

LOW VELOCITY MOST EFFECTIVE.

As for every man who afterward dies from a wound made by a high velocity
bullet there are about ten who die from wounds made by the low velocity
shrapnel and shell fragments, the importance is seen of protection
against these low velocity wounds if it can be had.

The wearing of armor means the lessening of the mobility of the soldier.
In the open field lessening of mobility means a decrease in efficiency,
which cannot be tolerated. However, in trench warfare the mobility of
the individual does not count for so much, as even during an attack he
does not have to go far, and generally does it at a walk in the rear of
the barrage fire of his own artillery.

Efficiency in warfare, as indicated by the keeping of such records, has
set the brains of the world at work, and armor is used to a limited
degree for the protection of men in greatly exposed fronts or open
positions.

The Japanese in modern times were first to resort to the forerunner of
armor. They used shields of steel and in the siege of Port Arthur such
shields were strapped to the front of the body. The Germans in the
charges have frequently used double shields, advancing in groups of four
behind a steel protector carried by two men, leaving the other two free
to fire at the enemy through port holes in the armor shields.

None of the armors has, however, proved its resistance to the high
velocity bullets which the powerful field guns rain against it.
Experiments are being made continuously along these lines, and Guy Otis
Brewster, of New Jersey, has developed a bullet-proof jacket and
headgear which it is said approximates perfection.

In the presence of ordinance officers from the Picatinny Arsenal he
invited an expert military marksman to fire at him from a distance of 60
yards. A Springfield rifle was used, with regulation ammunition. The
steel bullet had a velocity of 2740 feet a second. Only one shot was
fired, but it failed to penetrate the armor.

COMPOSITION A SECRET.

The composition of the latter is a secret, beyond the fact that it
consists in part of steel. Jacket and headgear