Show HIGH POWERED SEARCH LAMP new type for use in the united states navy Is said to be the best of its kind A new type of search lamp which at a distance of 0 five miles will produce about live times limes as intense illumination as the ordinary types Is being experimented with by the tha united S states t a ite navy heretofore in the attempt t cm t to produce more powerful search jamrs large reflectors have been used and large currents have been made to low flow through the are arc between re relatively I 1 at I 1 v ely small email carbons the latter method of developing an intense light has until now been limited by the fact that carbon volatilizes at extremely high temperatures and Is therefore cont costumed umed very rapidly in the he new search lamp described in the electrical world the dimensions are kept small without causing the carbons to deteriorate rapidly by rotating them in a stream ot of alcohol vapor although a vapor ignites and burns with a non luminous lame flame its temperature atu r Is so much lower than that of 0 the carbons that it actually cools thorn them the cooling also concentrates the arc and keeps it at tile tho focus 0 of the reflector thereby causing the light rays to extend in practically parallel lines from the reflector and to produce intense illumination even at great distances |