Note 1617 — BOOK XXXIV. THE NATURAL HISTORY OF METALS.

“Ærugo.” The researches of modern chemists have ascertained the composition of verdigris to be a diacetete of copper; the sesquibasic acetate and the triacetate are also to be considered as varieties of this substance; we have an exact analysis of these salts in the “Elements” of the late Dr. Turner, the Sixth Edition, edited by Professor Liebig and Mr. W. Turner, pp. 931, 2. Most of the processes described in this Chapter are mentioned by Dioscorides.—B. See also Beckmann, Hist. Inv. Vol. I. p. 171, et seq., Bohn’s Edition.