ELECTRIC LIGHT REVOLUTION.

Dunstan Times, Issue 2677, 4 August 1913, Page 8

ELECTRIC LIGHT REVOLUTION.

Cold, light—that is to say, light which is separated from heat, and therefore gives no heat—is the latest development of electricity as an illuminanb The inventor of cold electric light is Professor Charles Francis Dussand, the eminent French savant, and a demonstration of his invention is to bo given by Professor Eayet, of Belgium in London. Professor Dussand is a former pupil of Professor Branly, who first discovered the principle of wireless telegraphy, and ho conceived the idea of applying the law of rest to electric current. The adaptation of the principle has enabled him to apply to an electric lamp or series of lamps a considerably larger quantity of current than the maximum they are designed to absorb, thus obtaining such a powerful light as under ordinary circumstances would cause the lamps to hurst in a few seconds. By using a series of rapid flashes and each of the duration of a fractional part of a second and so accelerated that the eye cannot detect them, an impression of continuity is conveyed, and the heat being separated from the light, the lamp does not become hat and burst, but remains cold. | Two advantages are claimed for cold light—a. saving in current of about 93 per cent, ami an increase of illuminating power. Owing to the latter, it is only necessary to use a miniature lamp. Cold light,‘it is stated, may bo used for— Electric lighting in general. Military and naval purposes. Maritime purposes. Ornamental and academic purposes, including cinematography, photography, etc. The increased illumination from cold light will, it as claimed, make it possible to supply the Navy with powerful reflectors and projectors, which, may ho easily transported and fitted to the smallest boat. It could bo used in Morse signalling apparatus, searchlights. submarines, airships, and aeroplanes. Another advantage claimed for cold light is that the danger of fire in cinematography ia entirely eliminated.