Salt Lake Herald-Republican | 1911-10-27 | Page 14 | Ultra-Violet Rays

I ULTRA RAYS BAYS Professor ProCessor J. J von on Kowalski in a a. let letter letter letter let let- ter to Nature London describes his ob observations of at the spectra of ot sunlight reflected by snowfields In Switzerland Ho lIo finds that the violot rays are reflected by snow almost In tn their en en- This fact tact helps to explain th the th trying effects of ot such light bight upon the eyes and suggests the tho advisability of ot wearing during durin a n. period of at anti Ind sunshine glasses that are aro Opaque to the violet ultra rays