Popular science monthly . y-. An interestingsidelight of the investigation will showwhether or not the lighting system of theTreasury Building is good. Steps arealready being taken to correct many ofthe lighting faults that have existed. Pocket-Flashlight Distress-Signals AXKWtt\slem - cell battery. At one endthere is a parabolic reflector about fiveinches in diameter. Fitted at the baseof the reflector is a six-volt bulb with ahighly concentrated tungsten the other end is a key or switch toturn the current on or off and flash thelight. Messages are sent b\ long andshort flashes, c
Popular science monthly . y-. An interestingsidelight of the investigation will showwhether or not the lighting system of theTreasury Building is good. Steps arealready being taken to correct many ofthe lighting faults that have existed. Pocket-Flashlight Distress-Signals AXKWtt\slem - cell battery. At one endthere is a parabolic reflector about fiveinches in diameter. Fitted at the baseof the reflector is a six-volt bulb with ahighly concentrated tungsten the other end is a key or switch toturn the current on or off and flash thelight. Messages are sent b\ long andshort flashes, corresponding with theMorse code dots and The flashlight consists of aheavy nickel-plated barrel en-casing a dry cell battery andhaving at one end a parabolicreflector fitted with a bulbcontaining a tungsten filament possible and will alsomake it possible to flashcommunications. HenceCoast Guardsmen can signal m a ^hip mdistress its approximate [position and tiUthe master thi- best course to safe onK- slightly larger than tiupocket lam|)s in common use, the newlight i)ro(luces a flash that can be seenfor seven miles in good weather. It con-sists of a heavv nickel piatcil barri-1 en- Keteiiiiy (oast Guard oliicers madeexperiments with the new signal light olTthe Xirginia Cajies on a stormy night,(ape ilenr\- light, which under goodcon<litions ii^ \isibU for nearly lwent\-threi mills, could not biseen for morethan eight miles. The pocket flash couldbe sein four and one-half miles. MO Piping Oil to Ships at Sea
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
