Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

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These, apparently, were generating current at an extremely high frequency.

The energy aspect of the rays you can best understand as simply a vibration in the ether—an extremely high frequency one.

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Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.