Note {12} — Chapter X

Note 12.—The expression here is in the Geog. Text, “Roze de l’açur,” and in Pauthier’s “de rose et de l’asur.” Rose Minerale, in the terminology of the alchemists, was a red powder produced in the sublimation of gold and mercury, but I can find no elucidation of the term Rose of Azure. The Crusca Italian has in the same place Terra dello Azzurro. Having ventured to refer the question to the high authority of Mr. C. W. King, he expresses the opinion that Roze here stands for Roche, and that probably the term Roche de l’azur may have been used loosely for blue-stone, i.e. carbonate of copper, which would assume a green colour through moisture. He adds: “Nero, according to Pliny, actually used chrysocolla, the siliceous carbonate of copper, in powder, for strewing the circus, to give the course the colour of his favourite faction, the prasine (or green). There may be some analogy between this device and that of Kúblái Khan.” This parallel is a very happy one.