liquid, and find that the silver in it has completely coated the inside
of the glass. Pitchers and goblets are made in the same way, except that
the lining, instead of being sucked in by the blower, is pushed in with
a plug. After silvering, the stem and foot of the goblet are put on,
and the hole in the bottom of the pitcher is closed up."
"Now I know," said Lawrence, "how those fancy
glasses are made that seem to be nearly full of wine, but when you go to
drink, it turns out to be only a little wine, or some other colored
liquid, under the lining. You can fool a fellow by making believe you
are going to throw it in his face. Do you make window-glass here?"
"O no; blowing window-glass is another business
entirely."
X.
WINDOW-GLASS AND PLATE-GLASS.
"What! is window-glass blown?"
"Certainly. What is called English crown glass
is made in this way. It is first blown into a large globe, then flattened
and reversed on a ponty. Where the glass breaks off from the pipe, a hole
is left. That side is then made melting hot before the furnace; it is
whirled so swiftly that the centrifugal force given to it enlarges the hole,
gradually at first, then faster
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