Note 31 — NEUTRAL SALTS.
William Withering translation
I have lately diſcovered a ſpecimen of Terra Ponderosa aerata got out of a mine in this kingdom. It is very pure, and in a large maſs. As this ſubſtance is a new acquiſition to mineralogy, and may be turned to uſeful purpoſes in Chemiſtry, I intend ſhortly to preſent a more particular account of it to the Royal Society. W.