Just as in the case of ordinary artificial illuminants, such as lamps of various kinds, we have to manufacture a large amount of ether radiation of long wave length, which is of no use to us for visual purposes-in fact, creating ninety-five per cent, of dark and useless waves for every five per cent.
"Hertzian Wave Wireless Telegraphy"
John Ambrose Fleming
Gas as General illuminants," and cover an astounding range of inquiry and comment.
"Edison, His Life and Inventions"
Frank Lewis Dyer and Thomas Commerford Martin
This was not long nor universally the spirit shown; and to-day in hundreds of cities the electric and gas properties are united under the one management, which does not find it impossible to push in a friendly and progressive way the use of both illuminants.
"Edison, His Life and Inventions"
Frank Lewis Dyer and Thomas Commerford Martin