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Curiosities
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CYLINDRICAL LAMP-GLASS.
Stages in blowing a tumbler.
The first and only gathering is A; marvered and expanded by blowing, B; this having been allowed by its own gravity to drop upon the marver, upon further blowing, it resembles C; it is then whetted off at D; and the punty takes the flat end by adhesion E; which is then sheared, flashed, thrown, and finished.
The above supposes a strong flint best pint tumbler to weigh 16 oz. When common light cheap tumblers are required, they are not sheared, and no pains is taken in polishing out the marver marks.
Alternate profiles for blowing a tumbler.
They are ringy or wavy, and are called tale tumblers. The barrel shape, E, and beaker shapes, F, are but modifications of the same principle of manipulation.

CYLINDRICAL LAMP-GLASS.

Another simple piece of one gathering is the Lamp Chimney, which requires pendulum and circular swinging motions to elongate the shape. The quantity of meal being small and light, the throw must be sharp and decided.
Stages in blowing sylindrical lamp-glass.
The first solid gather, A, is expanded and swung out, until it becomes during the blowing as B. It receives more blowing and swinging until it is much longer, as C; a lump at the end is whetted off at the