Note 1637 — BOOK XXXIV. THE NATURAL HISTORY OF METALS.
John Bostock translation
“Atramentum sutorium.” It was thus called from its being used for colouring leather. Under this name he probably includes green vitriol, or sulphate of the protoxide of iron, and blue vitriol, or sulphate, and hydro-trisulphate of copper, the former of which is, properly, our copperas. See Beckmann, Hist. Inv. Vol. I. p. 181, et seq. Bohn’s Edition. See also Note 1624 above.