Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 139
ERS. two heads, C C and D D, that are convex upwards. E E is the steam space, and F the water line.G G is that part of the boiler which is below the lower tube-head C C, and H H the bottom of theboiler. This bottom is convex outwards, and may be either spherical or conical; and as the direct…
Mechanical engineering
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