Note 2251 — BOOK XXXV. AN ACCOUNT OF PAINTINGS AND COLOURS. (continued 2)

There are three distinct kinds of bitumen. 1. Naphtha, also known as petroleum, or rock-oil, inflammable, volatile, soluble in alcohol, and found in France and Italy. 2. Asphalt, or bitumen of Judæa, solid, insoluble in alcohol, and found in Lake Asphaltites in Syria, more particularly. 3. Pissasphalt, of a medium consistency between the other substances, of which it appears to be composed. See B. xxiv. c. 25.