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)
ed oftwo casings of iron, one contained within the other, havingbetween them a space about 3 inches in breadth ; the mag-nitude of the box being 3 feet in length, 2 feet in width, and3 feet in depth. The casing which surrounds the box com-municates with the lower part of the boiler by a pipe… … iinnnnnn flows freely through the pipe c, into the casing which sur-rounds the furnace or fire box, and fills this casing to thesame level as that which it has in the boiler. When theengine is at work, the boiler is kept about half filled withwater; and, consequently, the casing surrounding the…
Steam-engines
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