Steam Fire-Engine.

347

Chap. 8.]

. “ C the boiler, constructed on the principle of the ordinary locomotiveboiler, and containing 27 tubes of 1J inch diameter. The top of the steam-chamber and the horizontal part of the boiler should be covered with wood,to prevent the radiation of heat. c the fire door. d the ash pan.

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d' a box attached to end of boiler, inclosing the exit of the tubes. Thehot air from the tubes received by this box is passed off through smokepipe d", which is carried through D D, making a half spiral turn roundthe air vessel in the form of a serpent. c 4 , iron brackets riveted to theboiler, and bolted to the carriage frame. c 5 , a wrought iron stay, alsobolted to the carriage frame, for supporting the horizontal part of the boiler.