. Electrical news and engineering . syounger than he really was. In his death the company lose a valued and faithful servant. .•\dv.\\t.\ges of Electric Light ix .Air inMixing.—The results of some recent experiments ofDr. Haldane have been made public. They refer tothe presence of black damp ; he finds that when thepercentage of oxygen has fallen to a candle isextinguished ; at per cent, of carbonic acid gas,and per cent, of carbonic oxygen his respirationbegan to deepen, and at and per cent, re-spectively there was violent panting ; at 7 per cent, ofoxygen consc
. Electrical news and engineering . syounger than he really was. In his death the company lose a valued and faithful servant. .•\dv.\\t.\ges of Electric Light ix .Air inMixing.—The results of some recent experiments ofDr. Haldane have been made public. They refer tothe presence of black damp ; he finds that when thepercentage of oxygen has fallen to a candle isextinguished ; at per cent, of carbonic acid gas,and per cent, of carbonic oxygen his respirationbegan to deepen, and at and per cent, re-spectively there was violent panting ; at 7 per cent, ofoxygen consciousness would probably have been thus shows that there is a wide margin betweenthe point of the extinguishing of a lamp and thepoint of danger to life ; a miner provided with anelectric lamp could therefore penetrate with impunityor escape through atmophere containing at leastthree times as much black damp as would extin-guish a lamp and the difficulty of respirationwould give ample warning if the electric lamp CflNADlflN EbEGTRlCfllj NEWS July, 1896 PUBLISHED ON THE FIFTH OF EVERY MONTH BY CHAS. H. MORTIMER, Office : Confederation Life Building, Corner Vonge and Richmond Streets, T0Ii03Sn?0, - - Telephone 2362. New York Life Insurance Building, Montreal. Bell Telephone 2209. ADrtSRTXSEalByTS. Advertising rates sent promptly on application. Orders for advertising shouldreach the office of publication not later than the zslh day of the month immediatelypreceding dale of issue. Changes in advertisements will be made whenever desired,without cost to the advertiser, but to insure proper compliance with the instructionsof the advertiser, requests for change should reach the office as early as the 22nd dayof the month. SVBSCRIPTlOlfS. The Electrical News will be mailed to subscribers in the Dominion, or theUnited States, post free, for $ per annum, 50 cents for six months. The price ofsubscription should be remitted by currency, registered l
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