A treatise on the origin, progressive improvement, and present state of the manufacture of porcelain and glass (1832)
[Porter, George Richardson], 1792-1852. [from old catalog] · Philadelphia, Carey & Lea · leaf 143
ials, by heating them to redness andthen allowing them to cool gradually as in the annealing oven. 142 GLASS MANUFACTURE. CHAP. IV Not only was their quality of bursting corrected by this treat-lment, but the particles of glass were made to assume a closerunion among themselves, which fact was… … previously mentioned, in the part of the oven most exposed tothe heat of the fire, which, it will be remembered, is kindledunder one end only. Each one of these lier pans or fraiches, asit is filled, is pushed forward in the oven, towards the colderend, to make place for a fresh tray, until the…
Porcelain · Glass manufacture
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