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I took hold of it, and it did turn readily in any direction. I could feel the heavy little flywheel inside.

“There is a pretty high vacuum in that aluminum case,” went on Norton. “There’s very little friction on that account. The power to rotate the flywheel is obtained from this little dynamo here, run by the gas-engine which also turns the propellers of the aeroplane.”

“But suppose the engine stops, how about the gyroscope?” I asked sceptically.

“It will go right on for several minutes. You know, the Brennan monorail car will stand up some time after the power is shut off. And I carry a small storage-battery that will run it for some time, too. That’s all been guarded against.”

Jaurette cranked the engine, a seven-cylindered affair, with the cylinders sticking out like the spokes of a wheel without a rim. The propellers turned so fast that I could not see the blades–turned with that strong, steady, fierce droning buzz that can be heard a long distance and which is a thrilling sound to hear. Norton reached over and attached the little dynamo, at the same time setting the gyroscope at its proper angle and starting it.

“This is the mechanical brain of my new flier,” he remarked, patting the aluminum case lovingly. “You can look in through this little window in the case and see the flywheel inside revolving–ten thousand revolutions a minute. Press down on the gyroscope,” he shouted to me.

As I placed both hands on the case of the apparently frail little instrument, he added, “You remember how easily you moved it just a moment ago.”

I pressed down with all my might. Then I literally raised myself off my feet, and my whole weight was on the gyroscope. That uncanny little instrument seemed to resent–yes, that’s the word, resent–my touch. It was almost human in the resentment, too. Far from yielding to me, it actually rose on the side I was pressing down!

The men who were watching me laughed at the puzzled look on my face.

I took my hands off, and the gyroscope leisurely and nonchalantly went back to its original position.

“That’s the property we use, applied to the rudder and the ailerons–those flat planes between the large main planes. That gives automatic stability to the machine,” continued Norton. “I’m not going to explain how it is done–it is in the combination of the various parts that I have discovered the basic principle, and I’m not going to talk about it till the thing is settled by the courts. But it is there, and the court will see it, and I’ll prove that Delanne is a fraud–a fraud when he says that my combination isn’t patentable and isn’t practicable even at that. The truth is that his device as it stands isn’t practicable, and, besides, if he makes it so it infringes on mine. Would you like to take a flight with me?”

I looked at Kennedy, and a vision of the wreckage of the two previous accidents, as the Star photographer had snapped them, flashed across my mind. But Kennedy was too quick for me.

“Yes,” he answered. “A short flight. No stunts.”

We took our seats by Norton, I, at least, with some misgiving. Gently the machine rose into the air. The sensation was delightful. The fresh air of the morning came with a stinging rush to my face. Below I could see the earth sweeping past as if it were a moving-picture film. Above the continuous roar of the engine and propeller Norton indicated to Kennedy the automatic balancing of the gyroscope as it bent the ailerons.

“Could you fly in this machine without the gyroscope at all?” yelled Kennedy. The noise was deafening, conversation almost impossible. Though sitting side by side he had to repeat his remark twice to Norton.

“Yes,” called back Norton. Reaching back of him, he pointed out the way to detach the gyroscope and put a sort of brake on it that stopped its revolutions almost instantly. “It’s a ticklish job to change in the air,” he shouted. “It can be done, but it’s safer to land and do it.”