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The compressed-air bottles did the trick. He and Santos slowed down as the little jets overcame the inertia that was taking them along with the burning boat. The boat was spiraling now, burning freely. It moved away from them, its stern jets still firing weakly. Rip took a look toward the enemy cruiser. The assault boat was no longer showing an exhaust.
Before 1876 the Gatling gun, dynamite, and the barbed-wire fence were introduced; the compressed-air rock drill, the typewriter, the Westinghouse air brake, the Janney car coupler, the cable-car system, the self-binding reaper and harvester, the cash carrier for stores, water gas, and the tin-can-making machine were invented, and Brush gave the world the first successful electric light.
The lieutenant opened a cupboard door and displayed a diver's suit, only that it was made of oiled silk, and both its compressed-air knapsack and its helmet were of an alloy of aluminium and some light metal. "We can go all over the inside netting and stick up bullet holes or leaks," he explained. "There's netting inside and out. The whole outer-case is rope ladder, so to speak."
A sudden, furious hissing burst out beneath her, as the compressed-air valves were thrown and the air-cushions formed beneath her thousands of spiracles. Then, with hardly a shudder, easily as a tired gull slips down into the quiet of a still lagoon, the vast air-liner took earth.
She was equipped with depth-gauges showing the distance below the surface, and another device showing the trim of the vessel; compressed-air tanks, propelling and pumping machinery, an air-compressor and dynamo which supplied the current to light the ship and also for the searchlight which illuminated the under-water pathway all this apparatus left but little room in the hold, but it was all so carefully planned that not an inch was wasted, and space was still left for her crew of three or four to work, eat, and even sleep, below the waves.
Of course, that would not be dangerous, since space suits were equipped with six small compressed-air bottles for emergency propulsion. But it would be embarrassing. Inside the boat, Dowst and Nunez were setting up the compartment. Sections of the rear wall swung out and locked into place against airtight seals, forming a box at the rear end of the boat.
It is a well-known fact in the use of compressed air that such a condition is the best possible way to secure an explosion. "It would all seem so natural, even if discovered," explained Kennedy rapidly. "The smoking oil smoking just as an automobile often does is passed into the compressed-air pipe.
I did not agree with those who have said there is no difference running submerged or on the surface. Under way on the surface was one thing. But when we dived it was most unpleasant. I had been reassured at the start when I heard that there were ten compressed-air tanks under a pressure of two thousand pounds to the square inch.
With a confident smile Arcot switched on the current of the big magnet. At once a terrific magnetic flux was set up through the light-metal. He took the little compressed-air saw, and applied it to the crystal plate. The smooth hiss of the air deepened to a harsh whine as the load came on it, then the saw made contact with the refractory plate.
"As to the latter," said Thorndyke, "it is probable that he used a compressed-air attachment, not only to diminish the noise, but also to prevent any traces of the explosive from being left on the dagger. As to the former, I think I can give you the murderer's name; but we had better take the evidence in order. You may remember," he continued, "that when Dr.
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