. The street railway review . hurt. The explosion wasof course caused by gas collected under the boilers. Itcould collect there from only two causes—leaks in thepipes under the boilers or a flow of more gas than therewas oxygen of the air present to burn. The fact of aprevious momentary increase in the gas pressure makes the. NATURAL GAS EXPLOSION, INDIANAPOLIS. latter look like the probable cause, although as far as weknow,the engineer had fiom previous experience no rea-son for supposing that the usual air supply* was not suf-ficient to burn the volume of gas which would flow atthe full pres
. The street railway review . hurt. The explosion wasof course caused by gas collected under the boilers. Itcould collect there from only two causes—leaks in thepipes under the boilers or a flow of more gas than therewas oxygen of the air present to burn. The fact of aprevious momentary increase in the gas pressure makes the. NATURAL GAS EXPLOSION, INDIANAPOLIS. latter look like the probable cause, although as far as weknow,the engineer had fiom previous experience no rea-son for supposing that the usual air supply* was not suf-ficient to burn the volume of gas which would flow atthe full pressure available under the boilers. The fullpressure is supposed to be used when required. The gasinspector had daily visited the station to take readingsunder the same conditions as when the explosion tookplace. The explosion occurred on Friday at 4 p. m., andthe entire plant was started Monday at 11 a. m. Theboilers were reset and piping and building repaired inthat time. It was wonderfully quick work, as the nightof the explosion it looked as if a week would not he suf-ficient to repair the damage. * , ** Suggestions on Live Subjects. RY GEOltGE II. LEONARD, NEWTON & BOSTON STREET In relation to the much discussed question of high andlow speed engines, I think that 300 horse-power, or above,should be slo
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