The steam engine familiarly explained and illustrated; with an historical sketch of its invention and progressive improvement; its applications to navigation and railways; with plain axioms for railway speculators (1849)
curity. When the force of thesteam exceeded the length of the column of mercury whichthe tube would contain, the mercury would be blown out,and the tube would give vent to the steam. The water bywhich the boiler was replenished was forced into it by apump worked by the engine. In order to economize…
Steam-engines
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