inch thick, with a polished surface, placed upon a wooden stand: upon
this slab, the lump of glass is rolled to give it a regular exterior,
so that the result of expansion by blowing may be uniform in thickness
of metal.
Glass-maker's Chair.
The Glass-maker's chair, M,
is used chiefly by the workman, although occasionally by the servitor
and footmaker. It consists of a flat seat of timber, about ten inches
wide, each end being fixed to a frame, connected with four legs and
two arms—the latter upon an incline. An edging of wrought iron
is screwed upon these inclined planes, for rolling the blowing-iron,
with the hot glass at the end of it, backwards and forwards with the
left hand; thus causing the rotary motion of the pole lathe, while the
right hand, with the pucellas, gives the requisite form.
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