Note 3193 — BOOK XXXI. REMEDIES DERIVED FROM THE AQUATIC PRODUCTIONS.

Ajasson remarks, that from this we may conclude that the fabrication of nitrate of potash, or saltpetre, was in its infancy. It is by no means improbable that the artificial nitrum, here mentioned by Pliny, really was artificial saltpetre, more or less impure; the native nitrum, on the other hand, being, as Beckmann suggests, a general term for impure alkaline mineral salts, in common with native saltpetre. Pliny’s account, however, is confused in the highest degree, and in some passages far from intelligible.