United States. Bureau of the Census. Statistical Research Division. 10th Census, 1880, Weeks, Joseph Dame, 1840-1896 · New York : D. Williams · leaf 62
as window-glass. Steass.—This is the glass used iu the manufacture of the remarkably faithful imitation of precious stones,which have been and are still so common, and is manufactured somewhat in the same way as optical glass, specialprecaution being adopted in the melting of the materials.… … Pressed glass is, strictly speaking, oue form of cast glass, tlic molten metal being gathered and cast in amold which would correspond with the table of the plate-glass works, the plunger of the jiress answering to theroller. There are, however, so many and important variations in the methods…
Glass manufacture
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