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We are not resigned to pestilences and already have plans drawn up to make the yellow fever germ "as extinct as the woolly rhinoceros." We are not even resigned to the absence of wireless telephony when once we have imagined its presence, or to the inconvenience of slow methods of travel when once we have invented swift ones.
The aerial wire is precisely the same for either wireless telegraphy or wireless telephony. The transmitter of a wireless telegraph set generally uses a spark gap for setting up the electric oscillations, while usually for wireless telephony a vacuum tube is employed for this purpose.
Graham Bell had turned his attention to telephony, and in Canada he designed a piano which could transmit its music to a distance by means of electricity. At Boston he continued his researches in the same field, and endeavoured to produce a telephone which would not only send musical notes, but articulate speech.
So the capping of the climax of the wonders of the telephone would be wireless telephony, each instrument being so attuned that the undulations would respond only to the corresponding instrument. This is one of the problems that inventors are even now working upon, and it may be that wireless telephones will be in actual operation not many years after this appears in print.
"One from the city below," was the instant reply given in full clear accents "I am speaking on the Sound Ray." She held her breath in mute wonder, listening. The voice went on, equably "You know the use of wireless telephony we have it as you have it, only your methods are imperfect. We speak on Sound Rays which are not yet discovered in your country. We need neither transmitter nor receiver.
Helium has been already cited; X-rays hardly require mention; radium, which has so materially aided sufferers from cancer, is still better known. Wireless telephony and transcontinental telephony with wires were both rendered possible by studies of the nature of the electric discharge in vacuum tubes.
"It says `The cat and the fiddle," he gasped, and forthwith he became a convert to telephony. By such tests the men of science were won over, and by the middle of 1877 Bell received a "vociferous welcome" when he addressed them at their annual convention at Plymouth. Soon afterwards, The London Times surrendered. It whirled right-about-face and praised the telephone to the skies.
With very few exceptions, the best that is used in telephony everywhere in the world to-day has been contributed by workers here in America. It is of peculiar interest to recall the fact that the first words ever transmitted by the electric telephone were spoken in a building at Boston, not far from where Benjamin Franklin first saw the light.
Railways, steamships, aeroplanes, telegraphy, telephony and cinematographs have all emerged from the region of "impossibilities." Röntgen-rays and radium have descended from the sphere of miracles. Experience should endow us with cautiousness in proclaiming impossibilities of the future.
There are not as many as are now in use in Chicago. The exasperated Parisians have protested. They have presented a petition with thirty-two thousand names. They have even organized a "Kickers' League" the only body of its kind in any country to demand good service at a fair price. The daily loss from bureaucratic telephony has become enormous.
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