Electric Echoes

Nikola Tesla is trying to prove that in electrical results "the earth acts entirely like an ordinary wire."

The electric fish of the Nile have a "battery" power equal to 200 volts. The electrical organ is situated in the skin, inclosing the whole body.

In the Prussian government dook yard at Kiel all the great machine shops are to be electrically driven from a central power plant of a capacity of 3,500 horse power.

A novel experiment in potato growing by aid of atmospheric electricity was recently tried in freland, resulting in a gain of 80 per cent. in crops. The most successful was a plot protected by wires attached to seven long stakes, planted about one foot deep and protected by wires cross-sectioned.

Mrs. Ayrton, of London, who read a paper before the electrical congress recently held in Paris, was the only woman present at those meetings. Her subject was the "The Electrical Are." Mrs. Ayrton is the only woman who is a member of the Institution of Electrical Engineers. She was elected last year.

The velocity of propagation of electromagnetic waves through space is about that of light — 186,000 miles per second. Telegraphic signals have a greatly diminished speed, due ta static capacity and self-induction. A test between Washington and St Louis showed a rate of 16,000 miles per second.

In Buda-Pesth there is a news telephone, and its object is to keep its 6,000 subscribers supplied with all the latest news. The service has a maiu wire 168 miles in length, and it is connected with private houses and various public resorts. From 7:30 in the morning until 9:30 in the evening 28 editions of news are spoken into the transmitter by ten men possessing loud, clear voices, working in shifts of two. The news is classified and given in accordance with a regular programme, and the service has been eminently successful.