That delicate instrument the radiophone,
constructed on this principle, has wide analogies with the apparatus
of to-day.
Sec. 6
Starting from the experiments of Hertz, the history of wireless
telegraphy almost merges into that of the researches on electrical
waves. All the progress realised in the manner of producing and
receiving these waves necessarily helped to give rise to the
application already indicated. The experiments of Hertz, after being
checked in every laboratory, and having entered into the strong domain
of our most certain knowledge, were about to yield the expected fruit.
Experimenters like Sir Oliver Lodge in England, Righi in Italy,
Sarrazin and de la Rive in Switzerland, Blondlot in France, Lecher in
Germany, Bose in India, Lebedeff in Russia, and theorists like M.H.
Poincare and Professor Bjerknes, who devised ingenious arrangements or
elucidated certain points left dark, are among the artisans of the
work which followed its natural evolution.
It was Professor R. Threlfall who seems to have been the first to
clearly propose, in 1890, the application of the Hertzian waves to
telegraphy, but it was certainly Sir W.
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