nce to right the craft.

For this can be done, and now some aviators practice plying upside down
to get used to doing it in case they have to by some accidental shift
of the wind. Some of them can turn complete somersaults, though this
is mostly done in monoplanes, and seldom in a biplane, which is much
more stable in the air.

"Feel all right?" asked Captain Grantly of Dick. He asked this, but
Dick could not hear a word, on account of the great noise of the motor.
But he could read the officer's lip motions.

"Yes, I'm all right," the young millionaire nodded back.

He was surprised to find, that, after that first sinking sensation at
the pit of his stomach, he was not afraid. He now felt a glorious
sense of elation and delight.

He was actually flying, or the next thing to it.

"We'll go a little higher," said the captain, as he elevated the rudder
a little more. The aeroplane kept on ascending. Dick looked down. He
did not feel dizzy as he had half expected. Far below him were the
buildings of Kentfield, and the green parade ground. But what were
those things like little ants, crawling over the campus?

Why the cadets, of course! They looked like flies, or specks. Dick
was ready to laugh.

On a level keel they now darted ahead at greater speed as Lieutenant
Larson turned on more gasolene. Then, when Dick had become a little
used to the novel sensation, they showed him how to work the different
levers. The motor was controlled by spark and gasolene exactly as is
an automobile. But there was no water radiator, the engine being an
up-to-date rotating one, and cooling in the air. The use of the
wing-warping devices, by which the alerons, or wing-tips are "warped"
to allow for "banking" in going around a curve, were also explained to
Dick by means of the levers controlling them.

You know that a horse, a bicyclist, or a runner leans in toward the
centre of the circle in making a curve. This is called "banking" and
is done to prevent the centrifugal force of motion from taking one off
in a straight line. The same thing must be done in an airship. That
is, it must be inclined at an angle in making a curve.

And this is accomplished by means of bending down the tips of the
planes, pulling them to the desired position by means of long wires. It
can also he accomplished by small auxiliary planes, called alerons,
placed between the two larger, or main, planes. There is an aleron at
the end of each m