. The Locomotive. sed. Such engines arefrequently known as fireless locomotives in distinction to com-pressed air locomotives. That they may become dangerous is wellshown by an article which appeared in the Austrian publication,Zeitschrift dcr Datnpfkesseluntersuchungs-und Jrersicherungs-Gesell-schaft a G. under date of August, 1921, which gives an account of theexplosion of one of these locomotives. The boiler of this locomotive, which was built in 1915, was 67 indiameter and 13^ ft. long and was designed for a maximum pressureof 190 lbs. On July 14. 1921. it was being charged from a boiler b
. The Locomotive. sed. Such engines arefrequently known as fireless locomotives in distinction to com-pressed air locomotives. That they may become dangerous is wellshown by an article which appeared in the Austrian publication,Zeitschrift dcr Datnpfkesseluntersuchungs-und Jrersicherungs-Gesell-schaft a G. under date of August, 1921, which gives an account of theexplosion of one of these locomotives. The boiler of this locomotive, which was built in 1915, was 67 indiameter and 13^ ft. long and was designed for a maximum pressureof 190 lbs. On July 14. 1921. it was being charged from a boiler builtfor 260 lbs. and the driver had just given the signal to stop chargingwhen the head of the boiler opposite the cab tore off circumferentiallyin the turn of the flange. The shell and the other head of the boilerwere thrown a distance of 1550 ft., in which flight it is said the boilerstruck the earth and the roofs of buildings six times. The driver ofthe locomotive was instantly killed. 52 THE LOCOMOTIVE [April,. Devoted to Power Plant Protection Published Quarterly HARTFORD, APRIL, 1922. Single copies can be obtained free by calling at any of the companys agencies. Subscription price 50 cents per year -when mailed from this office. Recent bound volumes one dollar each. Earlier ones two dollars. Reprinting matter from this paper is permitted if credited to The Locomotive of the Hartford Steam Boiler I. & I. Co. MINIATURE boilers, by which we mean boilers less than 18inches in diameter, have long been popularly classed as harm-less. Many have said that they would not explode and then,not having the strength of their convictions, have followed this by theremark that if one did explode it could do no damage. The fallacy of such statements can easily be proved by mathe-matical calculation. Proof of this nature, however, is not always con-vincing to the exponent of these small boilers and a practical demon-stration becomes necessary. Such a demonstration was given not longago by a
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