Show makaa powerful light adding a minute part of a rare metal rubidium to mercury usually used in mercury lumps lamps has resulted in the development of a lamp whose light approximates the ine metal tal causes the lamp to give red rays in addition to tho the mercury spectrum sPec irum the lamp la Is said to have a life ten times no na long as n nn an ordinary incandescent lamp costs 7 a dram but only one five hundredths hund redtha part of 0 tho the metal la Is used in ill each inma to change the from green to light red previously bously physicists had improved the mercury mercuri lamp by adding potassium litin to the tha mercury but the potassium la in bata to disintegrate the glass bulb or tube ot of tho the lamp popular Ble mechanics chant ca magazine Milga zine |