Note 1629 — BOOK XXXIV. THE NATURAL HISTORY OF METALS.

Brongniart is of opinion that the “sory” of Pliny is the sulphate of copper, probably with an excess of acid. He informs us that he has received a specimen of a native sulphate of copper from Cuença, in Spain, which possesses all the characteristics of “sory” as here described. He considers it more difficult to ascertain the chemical composition of “misy,” but is disposed to consider it as a mixed sulphate of iron and copper.—B.