ations of available, it is surprising that some one has not devised epoch-making work of the great Hertz. In his recent the bell. This apparatus can be arranged so that a a practical system for logging swamps before this date. lecture at the Royal Institution he showed some inter- With the… … it. This arrangement has block and swinging sheaves ELECTRIC CABLEWAY. been developed by Lodge into on the brackets, and is made an extremely sensitive wave to pass around a large metal- detector. One terminal of an lic sheave on the tailtree. electric circuit, containing a single voltaic cell and…
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