. Electric railway journal . minating engineers the inven-tion and commercial introduction of high efficiency lampshave constituted the most important improvement in elec-tric light effected for many years, but up to this time theselamps have not been practically available for railway serv-ice. The Buckeye Electric Company,.Cleveland, Ohio, however, has justmade the important announcementthat it has developed its tantalumlamp in two sizes—16 cp and the 32cp—for use on street railways. Theselamps consume only watts percandle, as compared with the ordi-nary 4 watts per candle lamp, so thatth
. Electric railway journal . minating engineers the inven-tion and commercial introduction of high efficiency lampshave constituted the most important improvement in elec-tric light effected for many years, but up to this time theselamps have not been practically available for railway serv-ice. The Buckeye Electric Company,.Cleveland, Ohio, however, has justmade the important announcementthat it has developed its tantalumlamp in two sizes—16 cp and the 32cp—for use on street railways. Theselamps consume only watts percandle, as compared with the ordi-nary 4 watts per candle lamp, so thatthey use approximately only aboutfour-sevenths as much power as thelatter. To those who are unacquaintedwith the properties of tantalum itmight be said that tantlum wire,when in a state of purity, only re-cently made commercially possible, has a tensile strengthof 57 tons per square inch, about equal .to that ofthe best steel wire. The metal tantalum melts at about2300 deg. C. It is unaffected by strong acids or alkalis at. Tantalum Lamp
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