Salt Lake Telegram | 1931-12-03 | Page 8 | Long Transmission of Light Signals to Planes Foreseen

lLong Long Transmission Of 01 Light Signals To Planes Foreseen NEW YORK Dec 3 P JP tion tion that light signals may b be transmitted transmitted trans trans- milled through several miles o odense ot of dense white fog to airplanes was made to the American Society of Mechanical Me Me- Engineers today The prediction was based on three years years' study of aviation lighting madat made mad nde at the General Electric company b by Dr Irving Langmuir and W. W F. F Wes Wes- It seems possible the Langmuir report said to draw the definite conclusion that with sources of reasonable rea rca intensity and with photoelectric trie detectors which can now b be built signals may be transmitted through dense donse white fog The presence pres pres- ence of smoke may greatly decrease he range The distance he added may reach several miles The best light i is diffused white which is the same sam sort of light illuminating clouds above cities at night The extremely sensitized cells cell which will see the signal lights th through ugh fog detect detec diffused light many thousand times too faint fo for tor the eye to see