The Montgomery advertiser., 1907-05-19
SUITABLE LIGHT FOR EYES.
Perfect illumination For Human Viz
 ion Yet tA He Dixcaxerea

l TeTfect Alumination For Human vfs- ion Yet to He Discovered. l It requires but little scientific know- ledge to be aware of the fact that the metallic showers of incandescent par tlcies throw or by the sun, acting on the earth's atmosphere. gives the most suitable light for human vision.
 When. therefore. perfect artificial illuminant Is found 1t will nearly ap- proach In character the work of nat ure. though 1t is scarcely possible to hope for it's healthful and hygianic qualities. If modern chemists can only discover a substance that will store sunlight and be capable of giving 1t on by radiation the problem will be near solution.
 The vitiation of the air of living rooms by artificial light is a matter for serious consideration. A common gas burner will alter the chemical composition of the atmosphere as much as the breath of four persons oil lamps. too. consume more or less oxl ygen and give off certain amount of carbonic acid gas. The electric light has, perhaps. less influence on the air or room than any iilumfnant now in general use. but 1t brings with 1t other elements of danger.
 With the intensely powerful lurnf- nants now available care chould be taken not to overdo the lighting and pitch 1t at too high key.
 visual usefulness is tho point to consider. A lamp placed where it fs required Is better than q misplaced arc light. Illuminants intended for house. hold use should he of moderate bril- iiancy and good color Judgment should also be shown in the artistic arrangement for the diffusion of lfght. An intelligent use of shades. not too brilliant in color will give a sense of repose.
 The light of the sun, when, full. is white changing to orange red when near the horizon. Acetylene gas gives nearly white light, while ordinary gas and paraffin incline to yellow. The use Of incandescent mantel turn a gas flame to a greenish white. in which slight tinge of yellow may still be perceived It will at once be seen, therefore. that each illumfnant requires a shade to correct its defects.
 All the practical illuminants now in use are composed of solid particles. usually carbon. brought to a state of incandescence. In lamps and ordinary gas the luminous flames are heated py tneir own combustion; electric light and incandescent gas are render ed incandescen by exterior means. Vacuum tubes. by which a gas ts rendered incandescent by an electric discharge. if improved on, have a great future for interior lighting Pos sipiS coHlblnaIlon or phOHphOreSOAnt I substances may be discovered that will ald in artificial illumination. Tn electric lighting the consumer is stiIl a very. very long way from getting an eoufv- | alent for the value of the coal burned Tn the generating plant There is an immense field open to the inventor to improve on the present forms of inter- | Tor lighting or give to the world nm entirely new method of artificial iirum- l nation
 Fl. c. Wells. who brings a thorough scientific education to the writing of romance. has given in When the Sleeper Wakes" glimpse of the man her In which both thoroughfares ana houses will be illuminated n century or so hence. The result suggests a worId In which the setting sun will not he
 nhssed' but he was not called upon in | the pages of a novel to describa tha | technical methods employed hv tha autocratic municipal officers who gov erned the great cities and who looked after the lighting of the homes of tbs | people. VI eha