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 900
Two improvements have been introduced in this operation. One consists in making part of the floorof the compartment a to consist of a movable stone about 10 inches in diameter, on which the cylinderis placed. It is gradually exposed on all sides to the action of the fire, by causing the stone to… … Crown-glass.—In the manufacture of crown-glass, in circular disks, a flattened vessel is first blown infront of a furnace specially constructed for the purpose, and this is converted, without auy interruptionof the process, into a round disk, thickened in the centre. 890 GLASS. Figs. 2145, 9146,…
Mechanical engineering
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