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To grind plate-glass, lay it horizontally upon a flat stone table, made of a very fine grained free-stone; and for its greater security, plaster it down with mortar or stucco. The stone table is supported by a strong wooden frame, with a ledge all round its edges, rising about 2 inches above the glass. Upon the plate to be ground is laid another rough glass, not above half as big, and so loose as to slide upon the former, but cemented to a wooden plank, to guard it from the injury it must otherwise receive from the scraping of the wheel whereto the plank is fastened, and from the weights laid upon it to promote the triture or grinding of the glasses.

The engine just described is called a mill by the workmen, and is employed only in grinding the largest-sized glasses. In grinding lesser glasses, they usually work without a wheel, having four wooden handles fastened to the corners of the stone that loads the upper plank, by which they work it about.

Jewelry Beads info: The primitive vessels which have been found in Egypt are small in size and consist of columnar stibium jars, flattened bottles and amphorae, all decorated with zigzag lines, tiny wide-mouthed vases on feet and minute jugs. The vessels of later date which have been found in considerable quantities, principally in the coast towns and islands of the Mediterranean, are amphorae and alabastra, also decorated with zigzag lines.

The evidence, however, hardly warrants the abandonment of the simple process of blowing in favor of a process which is so difficult that it may almost be said to be impossible, and of which there is no record or tradition except in connection with the manufacture of small beads.
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