Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: July 22, 2025
Then the hissing noise began to dwindle down to a wheeze, and then it stopped all of a sudden. That meant that the air-pressure in the lock was the same as that in the tunnel. Paddy pushed open the door in the other end of the lock from that by which we had entered. Along the bottom of the completed tube we followed Paddy and Capps. On we trudged, fanned by the moist breath of the tunnel.
"Though a sun of that size," replied Cortlandt, "might retain its heat for the time you wished to use it, the planet part would be nothing like as comfortable as what we have here, for it would be very difficult to get enough air-pressure to breathe on so small a body, since, with its slight gravitation-pull, to secure fifteen pounds to the square inch, or anything like it, the atmosphere would have to extend thousands of miles into space, so that on a cloudy day you would be in darkness.
He tested it, reading the tank air-pressure, power-storage, and other data from the lighted miniature instruments visible through pinholes above his eye-level. He fastened a space-rope about himself, speaking through the helmet's opened face-plate. "If our friends should wake up before I get back," he added, "please restrain them. I'd hate to be marooned."
Enough power was still left in her storage-batteries to operate the air-pressure system through the floats. This air, with a huge boiling and seething of the white surf, loosened the floats from the cling of the sand; and a score of men at the tackles succeeded at high-tide in hauling Nissr far up on the beach.
For, where before his suit had bulged out roundly with the inner pressure of one atmosphere, it now became less taut and it hung loosely about him when the hissing ceased. "An air-lock," said Spud joyfully, "or I'm a rat-tailed imp myself! That means a heavier air-pressure inside. And now I know 'tis men folks I'm goin' to see!"
This carried in the head of the Thunder Bird, big or little, would keep a record of as high as it went by the pencil automatically making marks so long as there was any air-pressure, like a guiding hand, to move it. "Yes." The weaver nodded. "And here here is the Will being read!"
Without exception they were ornithopters; that is, machines built on the bird-wing principle, sustaining themselves by a flapping motion rather than by air-pressure due to a propeller. Their size varied from one-seater affairs of very small size to craft large enough to hold a score. Most were gaudily painted. The surgeon's own machine was a two-seater, small but powerful in design.
As the torpedo left the sub the rudder man gave her a "down" rudder, which was to offset the tendency of the sub to shoot her nose to the surface; when the torpedo had gone the tank man turned on the air-pressure, which blew out what water had entered the torpedo chamber. By and by the other torpedo was fired.
Yet he did not make it. He was still unable to dispense with the condensing and vacuum and air-pressure ideas. Acting for the first time in the line of real efficiency, he failed to go far enough to attain it. He made a double-acting engine by the addition of many new parts; he even attained the point of applying his idea to the production of circular motion.
If the lever is moved to the left, and the two cocks that were open are closed, and the two that were closed are opened again, the pellet will be sent back to the other end of the tube. This movement of the pellet in the tube will occur as often as the lever is moved and there is any air-pressure in the forked tube.
Word Of The Day
Others Looking