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)
/l/mtK h the -liilJif. Jbujr. iyjPeterMaverick ■ BOILER A\D ITS APPENDAGES. 117 time the steam leaks between the cock and its case, andbeeomes wasted, and tends to vitiate the vacuum. Thesecocks are seldom used in condensing engines, except they besmall engines, but are frequently adopted in high…
Steam-engines
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