New York [etc.] Simmons-Boardman Pub. Co. [etc.] · leaf 174
ize of a small marble or a ten-centpiece will readily pass through the trap coik and lothe ground. Such an obstruction, or even smallpieces of sjalc, will interfei-e with and often en-tirely prevent the working of the usual thermostatictrap. The trap cock has always an opening C(|ual in areato the… … out indelinitely in any leinperalure whatever, with-out danger of any part of the apparatus freezing, andis also in readiness to be quickly heated by directsteam, when again brought into use. Like appara-tus is placed on each side of the car, thus allowingeach side to be heated separately. Wbeic…
Railroads · Railroad cars
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