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8
Matter Transmission

Using his knowledge of the alien tongue and coupling it to many of the so-called "harmless" records he had been permitted to toy with, Carroll found his work much simpler. There was that business of the circlet of wire mounted on the cylindrical podium in which vibrated a crystal.
He had a whole measure of that science, most of which, he admitted, was ridiculous, and meaningless to any Terran physicist unless he had the key to the art. A complete volume on electronic techniques would be meaningless to any man who knew nothing of electricity.