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 138
rrupt-ed from the French word marbre. By this means the par-ticles of glass are agglomerated in a cylindrical form, which isthen called by the workmen a paraison. The workman thenapplies his mouth to the other end of the tube, and blows strong-ly through it, so that his breath, penetrating the… … through the tube, otherwise the external air being more densethan the heated portion confined within, the globe would col-lapse : when it has been somewhat stiffened by cooling, thisaccident is no longer to be apprehended. M2 138 GLASS MANUFACTURE. CHAP. IV. The globe, which is not made…
Porcelain · Glass manufacture
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