Note 399 — ON AIRS, WATERS, AND PLACES.
Francis Adams translation
On the Thermal waters of the ancients, see Paulus Æginata, Vol. I., 72. I have treated fully of the ancient alum and nitre under στυπτηρία and λίτρον, in the Third Volume. Coray, in his notes on this passage, does not throw much light on this subject. The opinion here delivered by our author, that these metallic substances are produced by the operation of heat, is adopted and followed out by Aristotle towards the end of the third book on Meteorologia.