. Electric railway journal . oflight is obtained; that the life of the lamp is good, and thatthe tensile strength of the wire is greater and offers greaterresistance to mechanical breakage than a carbon filament. The installation of these lamps requires no changes in thecar or constructural wiring. The Buckeye Electric Company expects to make an ex-hibit of these lamps at the Denver convention. VACUUM VENTILATION FOR PAY-AS-YOU-ENTER CARSIN CHICAGO The Chicago Railways Company has just contracted forthe equipment of 350 of its new pay-as-you-enter type carswith the vacuum ventilation apparatus
. Electric railway journal . oflight is obtained; that the life of the lamp is good, and thatthe tensile strength of the wire is greater and offers greaterresistance to mechanical breakage than a carbon filament. The installation of these lamps requires no changes in thecar or constructural wiring. The Buckeye Electric Company expects to make an ex-hibit of these lamps at the Denver convention. VACUUM VENTILATION FOR PAY-AS-YOU-ENTER CARSIN CHICAGO The Chicago Railways Company has just contracted forthe equipment of 350 of its new pay-as-you-enter type carswith the vacuum ventilation apparatus known as the CookeSystem. It is thought that this company is the first to ing Engineers of Chicago Traction have carried on a seriesof car ventilation experiments. The Department of Healthof the city of Chicago has been highly interested in thiswork, and in connection with the investigation has carefullystudied the principles of ventilation and observed the qual-ity of the air maintained by the several types of ventilating. Interior of Chicago Car, Showing Exhaust Ventilators inCeiling systems which have been tested. The results of the earliertests made under the direction of the Board of Health werepresented in the Electric Railway Journal for May 8,1909, page 876, in an article entitled The results of a Studyof Car Ventilation in Chicago, by W. A. Evans, Commis-sioner of Health. As a result of the exhaustive tests car-ried on by the railway and city representatives, the Boardof Supervising Engineers has approved the Cooke system ofventilation, and the order for 350 equipments has beenplaced by the Chicago Railways Company. The Cooke system of car ventilation is designed to ex-haust the vitiated air by means of a motor-driven fan con-nected to an exhaust chamber in the roof of the air is drawn in through the lower part of the carbody and distributed by ducts which terminate at electricheaters under the car seats, thus affording a means for con-tinuously tempering th
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