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I gauged our movement, and dropped an explosive powder bomb. It missed. It flared with a puff on the rocks, twenty feet from where the two projectors were mounted. I saw that two helmeted figures were down there. They tried to swing their grids upward, but could not get them vertical to reach us. The ship was firing at us, but it was far away.
The use of amateur regenerative cascade audio frequency receiving sets is getting to be quite common. To get the greatest amplification possible with amplifying tubes you have to keep a negative potential on the grids.
Halsey added abruptly: "We had George Prince typed that time we arrested him four years ago. I'll show him to you." He snapped open an alcove, and said to his waiting attendant "Flash on the type of George Prince." Almost at once, the image glowed on the grids before us. He stood smiling sourly before us as he repeated the official formula: "My name is George Prince.
"Anyhow, that's what it does. There are two thousand separate little grids, each fed by its capillary jet, and each grid provides about ninety volts." Tombu took the opportunity to inquire, "Have you got that RF field-phase generator under control yet?" He pointed to still another section of the chassis. "Oh, yes." The physicist nodded.
With batteries, wires and grids, the whole device could lay in the palm of one's hand. Once past this field inspection I would rig it for use under my shirt, strapped around my chest. And I had some colored magnesium flares. The field operator came panting. "Who are you?" "Philip Grant. From Great New York." I showed him my name etched on my forearm. He and his fellows searched me, but I got by.
Permit me to introduce Dr. Ishie's adaptation of a French invention of some years previous, which permits the development of high voltages by the application of heat to the evaporation of a fluid medium such as water of which we have plenty aboard and you won't miss the little that I requisitioned causing these molecules to separate and pass at high speed through these various grids, providing electrostatic potentials in their passage which can be added quite fantastically to produce the necessary D.C. field which...."
All arrangements for the afternoon to be made in the morning seance, the rendezvous to be outside, not inside the house. After this came on the age of signals; whistlings outside the windows, rattling of the railings, comes through letter-boxes and ventilation grids, even on occasions of special deafness pebbles thrown against the panes!
When the trench mortars opened up, a maddening terror seized him and he wanted to run, to get away from that horrible din, anywhere to safety. So quietly sneaking around the traverse, he came to the entrance of a communication trench, and ran madly and blindly down it, running into traverses, stumbling into muddy holes, and falling full length over trench grids.
There were grids to walk on, but these more resembled greasy poles, for the slabs had been placed longitudinally on cross runners, and many of us used to slide off the end into some swampy hole. One of "B" Company's officers was a particular adept at this, and fell into some hole or other almost every night.
The corridor was two hundred feet or more below the ground level. At this hour of the night the business section was comparatively deserted. The stores and office arcades were all closed. Our footfall echoed on the metal grids as we hurried along. I felt depressed and oppressed. As though prying eyes were upon me.
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