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Updated: May 10, 2025
The essential parts of an ultroscope, then, are twin batteries with focal control and frequency control; an ultron shield, battery connected and adjustable, to intercept the direct rays from the "glow-spot," with an ordinary light-shield between it and the lens; and the lens itself, battery connected and with more or less telescopic elaboration.
Thus a simple battery may be used either as a sender or receiver of current. Two batteries adjusted to the same center line become connected in series just as if they were connected by ultron wires. In actual practice, however, two types of batteries are used; both the foco batteries and broadcast batteries.
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