Note 1624 — BOOK XXXIV. THE NATURAL HISTORY OF METALS.
John Bostock translation
“Atramenti sutorii, quod chalcanthum vocant.” We may presume that this substance was somewhat different from the “atramentum sutorium” mentioned in the last Chapter: the word “chalcanthum” means “flower of copper;” χαλκοῦ ἄνθος.—B. Delafosse identities it with blue vitriol, sulphate, or hydro-trisulphate of copper. See Chapter 32.