. The Locomotive . e:et Mobile Electric I. between these two, and it is understood that this boiler remainedpractically intact, although both Nos. 5 and 6 boilers were said tohave been moved towards the north by the force of the explosion. CONDITION OF THE EXPLODED BOILERS. The Heine boiler, as far as the appearance of the parts shownafter the explosion, seemed to be in good condition. The closedhead on the mud drum of the Stirling boiler numbered 6, whichwas on the south side of this boiler next to number 5, was veryseriously corroded; in fact, the lower half of the head on this
. The Locomotive . e:et Mobile Electric I. between these two, and it is understood that this boiler remainedpractically intact, although both Nos. 5 and 6 boilers were said tohave been moved towards the north by the force of the explosion. CONDITION OF THE EXPLODED BOILERS. The Heine boiler, as far as the appearance of the parts shownafter the explosion, seemed to be in good condition. The closedhead on the mud drum of the Stirling boiler numbered 6, whichwas on the south side of this boiler next to number 5, was veryseriously corroded; in fact, the lower half of the head on this boilerwas reduced to approximately 3/16 inch in thickness. It appearsthat on this account the Government experts and others who ex-amined the ruins decided that the Stirling boiler was the initialcause of the accident, and that the Heine boiler had exploded dueto shock produced by the explosion of the Stirling. Notwithstand-ing this there are several reasons which seem to show that the 164 THE LOCOMOTIVE. [April. o. => Rear y GeneSau Method of TaiuureOF The NofiTH Boiue« orTt^cNo 4 I/nit or Two Heine Boiucrs. Mobile Electric Company. Fig. 2. Method of Failure of Heine Boiler. reverse of the above assumption was actually true. Almost theentire exploded Heine boiler — with the exception of the rear waterleg and steam drum head — was blown forward to the east, whilethe bottom portion of the rear water leg, including all the materialbelow the top row of tubes and the rear steam drum head, wasblown backwards against the new boiler-house. Great force wasexerted by this part of the explosion, as will be seen by the con-dition of the division walls in the vicinity, and the fact that aB, & W. boiler in the new boiler-house on the opposite side of thedivision wall, which was idle and undergoing repairs at the time,was moved on its foundation about 8 inches to the west. PROBABLE MANNER OF FAILURE. In separating from the drum it appeared clearly evident fromthe manner in which the
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