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It took them nearly an hour to find the communications room. And there they met disappointment. Ultra Vires' radio transmitter and receiver had been dismantled. There was nothing there but a jumble of broken tubes, discarded parts and bare wire ends dangling from the walls. Nothing but an overturned table and two bent metal chairs.
A finished instrument was then made, having a transmitter formed of a double electro-magnet, in front of which a membrane, stretched on a ring, carried an oblong piece of soft iron cemented to its middle. A mouthpiece before the diaphragm directed the sounds upon it, and as it vibrated with them, the soft iron 'armature' induced corresponding currents in the cells of the electro-magnet.
"Go right in the parlor, and help yourself," replied the farmer's wife. As Dick rang on, and stood waiting, transmitter at his ear, he first thought of calling for the police station. "No, I won't, either," he muttered. "This belongs to my paper. Let them tip off the police. Hello! Give me 'The Blade' office, Gridley, please." Dick waited patiently a few moments. Then: "Hullo!
He took out the slip of paper on which he had jotted down Steve's televector code number and transferred the information to an application blank. "This system," Alan said. "It means no one can possibly hide anywhere on Earth unless he removes his televector transmitter." "You can't do that, though. Strictly illegal.
But those fat soles were cleverly fashioned to hide a long, keen knife-blade, like a dirk. I could lift a foot and get the knife out of its hidden compartment with fair speed. This I had in one shoe. In the other, was the small mechanism of a radio safety recorder and image finder, with its attendant individual audiophone transmitter and receiver. A miracle of smallness, these tiny contrivances.
Alexander Graham Bell. I have really been telephoning on a beam of light." "Telephoning on a beam of light?" I repeated incredulously. "Yes," he explained, feeling now at liberty to talk since he had delivered his call for help. "You see, I talk into this transmitter. The simplest transmitter for this purpose is a plane mirror of flexible material, silvered mica or microscope glass.
"The parabolic reflector over there catches these light vibrations and focuses them on the cell of selenium which you perhaps noticed in the centre of the reflector. You remember doubtless that the element selenium varies its electrical resistance under light? Thus there are reproduced similar variations in the cell to those vibrations here in this transmitter.
Bascom could hardly believe it. "Are you sure?" "So they say. Asked me if I could get you to the 'phone without any trouble. She's right here now," he added, speaking into the transmitter. "I'll call her." The housekeeper wonderingly took the receiver from his hand. "Hello!" she began. "Yes, this is Mrs. Bascom. . . . Who? . . . What? . . . OH!"
From the force-field generators of the "Forlorn Hope" he selected the two most suitable for his purpose, tuned them to the exact frequency he required, and around them built a complex system of condensers and coils. Day after day passed. Their larder was full, the receptor was finished, and the beam transmitter was almost ready to attach to the turbo-alternator before the calm was broken.
"Make it in half an hour, can't you, Cornish?" said Jim. "There are some more things we ought to go over." "Say!" shouted Cornish into the transmitter. "Make that in half an hour instead of at once." He hung up the telephone, and turned to Elkins inquiringly. Jim was walking up and down on the rug, his hands clasped behind him.
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