a public edifice, an incrustation of this kind will be a record
ære perennius. The late Sir Jeffry Wyatville, in laying the
first stone of one of the towers of Windsor Castle,
adopted this mode of recording the event; and other architects of eminence
have placed these incrusted inscriptions in the foundations of various
public and private buildings.
A second patent was subsequently secured
by the author, by which medals, arms, crests, &c., are accurately
transferred from the dies on which they had been chased, to hollow
Glass-ware, especially where numerous repetitions of arms of elaborate
workmanship are required. This invention diminishes the expense of
engraving, in transferring the pattern by means of cakes of tripoli,
from the die to services of Glass-ware, and it has frequently been used
with great advantage. It is, indeed, an improvement of Mr. Tassie's
mode of accurately transferring small bas-reliefs or intaglio pictures,
from any material to solid Glass.
The invention of
pressing Glass by machinery has been introduced
into England from the United States of America. It has not, however,
realized the anticipations of manufacturers; for, by the contact of the
metal plunger with the Glass, the latter loses much of the brilliant
transparency so admired in cut Glass; hence, it is now chiefly used for
common and cheap articles. The process of rewarming or fire polishing,
after the pressure, has somewhat remedied this defect. The patent
pillar moulded Glass for articles of table use, is more successful,
as it preserves its transparent, pellucid brilliancy. The interior
is smooth, and the exterior having a second gathering of fused Glass,
is expanded by blowing, after it has been impressed by the mold; and by
rewarming, technically called fire polishing, the Glass preserves its
refractive brilliancy.
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