. Electric railway journal . ctice in single-cylinder machines of largecapacity. The details of the accident were reported briefly inthe issue of the Electric Railway Journal for March2, page 406. Since this was published the editors ofPower have completed an investigation of the causesof the turbine failure. They conclude that a distortedcast-iron diaphragm in the eighteenth stage probablyfouled the eighteenth wheel, breaking off the buckets and diaphragms from this stage on to thelast or twentieth, and the entire turbine casing, weredestroyed. The accident occurred just before 6
. Electric railway journal . ctice in single-cylinder machines of largecapacity. The details of the accident were reported briefly inthe issue of the Electric Railway Journal for March2, page 406. Since this was published the editors ofPower have completed an investigation of the causesof the turbine failure. They conclude that a distortedcast-iron diaphragm in the eighteenth stage probablyfouled the eighteenth wheel, breaking off the buckets and diaphragms from this stage on to thelast or twentieth, and the entire turbine casing, weredestroyed. The accident occurred just before 6 p. m., when theevening peak was coming on. Rubbing sounds fromwithin the casing were heard and the machine was seento vibrate. Within six minutes after the first indica-tion of trouble the destruction was complete. Fortu-nately steam was promptly cut off by the tripping ofthe automatic throttle valve, presumably through thevibration of the turbine. Some comment upon the ac-cident appears in the editorial pages of this March 23, 1918 Electric Railway Journal 565 Track Engineers Meet A Digest Is Presented of Reports of Electric Railway Interest Submittedat Meeting in Chicago This Week of AmericanRailway Engineering Association THE nineteenth annual convention of the AmericanRailway Engineering Association was being heldat the Congress Hotel, Chicago, as this paper wentto press. The annual exhibit of the National RailwayAppliances Association was being held at the sametime in the Coliseum. Abstracts of the reports ofespecial interest to electric railway men follow. Ballast The report recommends three different sections ofballast for 24-in. depth under the tie. These sectionsapply to single track on tangent, double track on tan-gent and single track on curve. Each shows 12 in. ofsub-ballast and 12 in. of top ballast. The committeefeels that Class A track should have 24 in. of ballastunder the tie, but is not ready to make general recom-mendations as to the proper depth of b
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