D, is the same as C, but with a
solid ball adhering to the flat part of the bowl; this being a separate
gathering, out of which the stem has to be lathed, or shaped, by the
tool called pucellas, as E, while it is rotating up
and down upon the inclined planes of the Glass-maker's chair, which
serves as a lathe. The stem is thus shaped ready to receive the foot.
The moment the Glass gets hard by cooling, the rubbing of the pucellas
must be discontinued, or an excoriated surface will be the consequence.
F has the globe attached to the stem, which is afterwards
opened and flattened by the pucellas into a foot, while lathed, or
rapidly rotated, as G, on the arms of the blowing chair.
H is the same, with the iron pontil adhering to the foot by
means of a small piece of gathered glass. The pontil secures the whole
preparatory to its being whetted from off the bowl, and released from
the blowing-iron at the dotted line, H H, by the touch
of the cold pucellas, contracting and slightly fracturing the Glass,
which is subsequently cracked through the entire circumference by a
smart blow of the pucellas. I, is the bowl under the
operation of shearing, so as to make it perfectly even, and fit for the
flashing the finishing. K, which is finally knocked off
for annealing from the end of the pontil by a sharp blow.