170с

SIGNALLING ACROSS SPACE WITHOUT WIRES.

HI'.INK A IlKSCH I !' 1 IOX

THE WORK OF HERTZ & HIS SKX'ESSORS.

S l___*

-^--31 , . A

BY

Prof. Sir OLIVER LODGE, F.R.S.

FOURTH EDITION,

Il'/f/t AilJitiniial Heina rh:s coiieerniii.j the A/ijilientinit to Telei/rei/ilti/, ami Later 1 "erel,")niieiitx. And a Chapter on The Principles of Tuning in Wibeless Telegraphy.

LONDON:

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