Show searchlight carbons carbon in huge electric searchlights that cast beams visible tor for GO 50 or CO miles on clear nights cle lits the carbons are not like those of ordinary are arc lamps in stead the electrodes are cored carbons Jonta containing ining chemicals in the cores the main source if light Is a small body ot of gas gaa contained in the crater at tile the end of 0 the tire electrode th this 1 9 crater of gas ga quadruples the strength C in cf c the beam bealli accommodation Is provided and many of the long established ones are elaborate stone edifices but in nearly near y every instance they have sprung from roro primitive structures structure such as the 0 one P described which lire are erected whew wh ew it a new site bile for it mission st chosen |