bs. In nearly all of them the only proof of success was the oil and
air bubbles which came to the surface.

One interesting encounter was that in which a British submarine sighted
a German U-boat, while both were on the surface. The British submarine
dived and later was able to pick up the enemy through the periscope and
discharge a torpedo in such a way as to destroy the German vessel. When
the British submarine arose it found a patch of oil in which Germans
were swimming.

Ordinarily, however, a submarine was of little service in a fight
against another for the radius of sight from a periscope is so short
that it is practically blind so far as another periscope is concerned.
This blindness of the submarine was taken advantage of by the Allies in
every possible way.

Merchant ships were camouflaged, that is painted in such a way that they
could not be easily distinguished at a distance. In the great convoys
ships were often hidden by great masses of smoke to prevent a submarine
from finding an easy mark. At night all lights were put out or else so
shaded as not to be seen by the enemy. The result of these methods was
the gradual destruction of the U-boat menace.

In the summer of 1918, while occasionally some ship was lost, the
production of new ships was much greater than those that were sunk.
During the month of June it was announced that the completion of new
tonnage by the Allies had outstripped the losses by thousands of tons.
During this period the United States had attained its full stride in
building ships, airplanes and ordnance.

[Illustration: Painting]
"HAIL COLUMBIA"
England greets the first American destroyer squadron to arrive in
European waters after the United States entered the war. The British
admiral asked Admiral Sims, who was in command, how long he needed to
refit and get ready for action. He replied "We are ready now."

[Illustration: Painting]
THE DAY'S WORK OF UNCLE SAM'S DESTROYERS
More than 2,000,000 men were safely landed in France guarded by the
destroyers, ready day or night whenever an enemy submarine threatened
a convoy, as was the case here in a trip over of the Adriatic loaded
with troops. In the foreground is the periscope of the attacking
submarine trying to submerge before she is hit.

Archibald Hurd, the English naval expert, said: "When the war is over
the nation will form some conception of the debt which we owe the
American Navy for the ma