A History of Inventions, Discoveries, and Origins, Volume 1 (of 2)Note 327 — COLOURED GLASS.—ARTIFICIAL GEMS.William Johnston translationLewis, Zusammenhang der Künste. Zür. 1764, 2 vols. 8vo, i. p. 279.◇Copy noteReturn to COLOURED GLASS.—ARTIFICIAL GEMS.