Show Electricity in Signaling The newest use of at electric lamps Is Iset ecret et signaling for tor military purposes By y properly screening signal lamps with certain materials only the Infrared Infra red nd rays which are Invisible to the raked noted eye eyo are released These are ure re re- ved at various distances by lensi tI ye Te apparatus which will vIll sound buzzers buz- buz and otherwise respond to the rays nen even though nobody in that region except except except ex ex- ex- ex the operators Is conscious of ot the tact that the peculiar light Is being transmitted |