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Show - ' - NEW INVENTION TALKS BACK . . . Designed by Dr. Donald H . Andrews, An-drews, professor of chemistry at Johns Hopkins university, a new method of radio reception through superconductivity is shown by Donald (Sandy) Andrews, 5, son of the inventor, who holds the balometcr, which is the heart of the new method of radio detection. Using no tubes, antenna, transformers, condensers or even electrical currents, the radio waves can be received and demodulated. Material is Columbian nitride. |