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This of itself would not have permitted them to see, as the darkness was intense. But now the scene was illuminated by a number of oil flares stuck upright in the ground in a rude circle. And right in the middle of the circle was the airplane stolen from Bob and Frank. There could be no mistaking the all-metal body nor the peculiar wing spread, even at that distance of close to half a mile.

That question finally had been solved by the purchase of a light, all-metal plane capable of carrying two passengers besides the pilot and able to alight on water and land. It was not a stock model but was built after a special design. All three boys had flown it, as well as Mr. Temple, and none had ever had an accident.

That all-metal body of the plane makes a fine ground, better than hanging wires possibly could. And with that new detector Bob and I have worked out, I'll bet we can hear all the way." "Sure," said Bob, getting up and stretching, "Well, come on, Frank. Let's turn in. It's near midnight. I for one need a good night's sleep. And I hope there'll be no trouble to disturb us tonight."

Emptying in this way is much quicker than when there is no pressure, and it assists to keep the boiler free from sediment. Testing Boilers. The tightness of the joints of a boiler is best tested in the first instance by means of compressed air. Solder on an all-metal cycle valve, "inflate" the boiler to a considerable pressure, and submerge it in a tub of water.

"She's wonderful," said he, as Brodeur settled himself at the wheel. "With her almost unlimited power, her impeccable controls and her automatic stabilizers, I hardly see what could happen to her." "Fire, of course, m'sieur," the ace replied, "always has to be guarded against." "Hardly on an all-metal liner. Now, here you see and here "

Hampton. He had been riding horseback across the range, miles from any oil derricks or pumping stations, on his way to visit one of the "independent" oil operators. A lonesome cowboy hunting a stray was the only other human being in sight, and he was a half mile away. Suddenly out of the sky swooped an all-metal airplane, glistening in the sun.

After a moment, bolts shifted and the door stirred and swung out, revealing the all-metal atmosphere chamber and the inner door at the far side. Immediately Carse floated into the chamber, and the two others pressed in behind. They saw the outer door swing shut, and heard its locks thud over. They were sealed from sight inside the port-lock's atmosphere chamber.

His pursuers were so close at hand they could almost grasp the wheels, as they leaped upward. Yet not quite. Bullets whistled about him, and several pinged against the body of the machine with a sharp metallic ring. Bob thanked his stars that the plane had an all-metal body. Once above pursuit, he was safe from stray rifle shots.

For instance, about midway on the long east wall, there were some thirty-odd all-metal pistols, from wheel lock to percussion. There was a collection of U.S. Martials, with two rows of the regulation pistols, flintlock and percussion, of foreign governments, placed on the left, and the collection of Colts on the right.

If an all-metal case is preferred, the reader might utilize the description given of a steam turbine on pp. 170-178. The details there given will apply to water as well as steam, the one exception being that a nozzle of the kind described above must be substituted for the steam pipe and small ports.