. Light and lighting. lightpenetrated _ inches or more below theskin. Nowadays 500-candle power in-candescent lamps with suitable refletcan lie used in place f arc lamp-. Ldghl i- used in the form of baths for hardening the allelic- and lor treating i heiimat i-m. The an light souit es i an l>e used for des-troying germs and promoting the growthearthy tissue. 1 3T8 FOB El i: K \ i IOOB. Some experiments on tins Bubjeot tundertaken by .1. I!. I ravath in con-junction with Professor C. E. of the methods employed i> for theobserver to gaze Bteadily at a card uponwhich certain let
. Light and lighting. lightpenetrated _ inches or more below theskin. Nowadays 500-candle power in-candescent lamps with suitable refletcan lie used in place f arc lamp-. Ldghl i- used in the form of baths for hardening the allelic- and lor treating i heiimat i-m. The an light souit es i an l>e used for des-troying germs and promoting the growthearthy tissue. 1 3T8 FOB El i: K \ i IOOB. Some experiments on tins Bubjeot tundertaken by .1. I!. I ravath in con-junction with Professor C. E. of the methods employed i> for theobserver to gaze Bteadily at a card uponwhich certain letters are printed, and tonotice the period of time before which the letters slightly UllITed. It appear- that this method is Sensitive both itigue of the eye and to abnormalconditions due to headache, irritation due to the (lllst of the eVe. ftc. There waS also a distinctly elaborate paper by Dr. Pel ice and M d, Bummarisi] continuation of the researches described THE ILLUMINATING ENGINEER (dec.) 557.
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