Wonders of Glass Making in All

Cover Wonders of Glass Making in All
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CHAPTER BEADS FOR NECKLACES, BRACELETS, AND CHAPLETS.
THE manufacture of beads for necklaces, brace- lets, and chaplets, whilst presenting great similarity to that of jet, in as mucli as both are produced from tubes of colorless or colored glass pierced through the centre, yet differ in one particular ; as the former are simple oblong tubes, while the others must from their destination receive a form more or less spheroidal.
It is this latter work that we are about to de- scribe.
The tubes, of
...a diameter proportioned to that of the beads which are required, are at first cut into cylinders of a height equal to their diameter, and are then placed in a pear-shaped drum of beaten iron containing a mixture of plaster and plumbago or of charcoal dust mixed with clay. The drum being placed on a furnace, the workman gives it a continu- ous rotatory movement by means of an iron axle which passes through it, so that the tubes softened by the heat lose the salient parts of their extremities, from the constant friction with each other, and take a spherical form.

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