Invents Sparkless Wireless System.

New York Times 100 years ago today, September 27, 1912:
French Engineer's Device Said to Send Messages Ten Times Quicker Than the Cable.
NO CONFLICT IN THE AIR
Messages Sent from Adjoining Stations Without Confusion — Apparatus Not Costly.
Special Cable to The New York Times.
    PARIS, Friday, Sept 27.— The Matin announces that a system of wireless telegraphy without sparks has been invented by a young French engineer, Julien Bethenod, one of the favorite pupils of the late Henri Poincare, and a personal friend of the wireless pioneer, Branly. By Bethenod's invention it is said to be possible to establish wireless stations in close proximity to one another without the messages being confused, and that it is also possible to exchange communications ten times faster than by submarine cables and ten times less expensively.
    M. Bethenod's wireless sparkless system necessitates as a plant only an alternator and antennae of a special character.
    The primary advantage of the system is that sound waves sent direct from the machine in the antennae will not be interfered with by other posts on the same zone. Moreover, thanks to automatic system of perforated bands, two stations will be able to exchange their messages at a maximum speed of 200 words a minute.
    Other advantages of Bethenod's system are greater simplicity of installation and cheapness, each wireless station being capable of doing the work of ten cables, yet costing hardly more than $200,000. Bethenod's discovery also makes wireless telephony still more possible. With a spark, only 2,000 oscillations per second can be produced, while the human voice can go to 20,-000 vibrations. By sparkless wireless telephony, 20,000 oscillations per second can be produced.