The Natural History of Pliny, Volume 6 (of 6)Note 3218 — BOOK XXXVII. THE NATURAL HISTORY OF PRECIOUS STONES. (continued 2)John Bostock translationAs to the “nitrum” of Pliny, see B. xxxi. c. 46.◇Copy noteReturn to BOOK XXXVII. THE NATURAL HISTORY OF PRECIOUS STONES. (continued 2)