Salt Lake Telegram | 1918-09-09 | Page 11 | Lightning Recorder Helps Our Fliers

t I L Lightning Recorder Helps Our Fliers I One of bf the most important things that military aviators wish to to know about the air before n long trips of ot several hundred miles mUes is ts the whereabouts hereabouts Jf df t thun thunderstorms At allwell allwell all an well appointed training camps various various va- va vaI va various I rious meteorological l data are re recorded recorded recorded re- re corded such as changes in the barometer barometer ba ba- ba- ba rometer rometer wind v velocity etc A highly ly sensitive electrical recorder described in the Electrical Experimenter Experimenter menter makes a mark from a pen ona on ona n na a sl slowly revolving paper chart secured se secured secured se- se cured to a clockwork driven drum for every lightning flash occurring In the vicinity In fact so sensitive Is this instrument that electric storms more than miles away have been accurately recorded on It It operates in n n. n similar manner to wireless re receiving receiving receiving re- re sets of early type which operated operated operated oper oper- with a or metal filings tube iube which responded to the electric waves f t The filings coheres la is so B lens lens' that it will respond t to all such usual atmospheric h disturbances t thus thus' lends itself well to such such poses as this The filings are m ml mii grains of nickel and s silver lver or silver a silver a ratio of ot 90 per cent nl ni I or steel to 10 per cent silver Is c used