Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 894
lved grains of sandare perceptible on cooling, and whether the mass, which still contains a quantity of air-bubbles, appearsuniform throughout. At the close of the melting process, the contents of the pot are not by any meanspure, or equally mixed. The solid matter is indeed all dissolved, but the… … Fining.—The last part of the process of glass-making is now arrived, which is termed the fining, andthe object of this is the removal of the air-bubbles and impurities, such as undissolved grains of sand,<fec, from the chemically finished glass, in order to prepare it for working. This process…
Mechanical engineering
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