Note 1739 — BOOK XXXIV. THE NATURAL HISTORY OF METALS. (continued 2)

This was probably lead ore in its primary state, when only separated from the stannum, and before it was subjected to fusion for the purpose of obtaining pure lead.—See Beckmann’s Hist. Inv. Vol. II. p. 211. Bohn’s Edition. Ajasson identifies it with litharge, or fused oxide of lead, known as gold and silver litharge, from its colour.