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 95
to keep up the most intense flame for any length of time. A valve is placedbetween the gasometer and the transferring bladder, which prevents the return of the gas. I I is alight wooden or stiff pasteboard cap, which combines sufficient strength with great lightness, so that incase an explosion of… … Bmall wires -which pass through the table of the instrument, as at L, into toe press-board below, wherethey are secured; this press-board is kept in a horizontal position by the stand, so that when the re-quisite pressure is given to it, the cap 1 I is brought to bear equally on the gasometer D.…
Mechanical engineering
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