Note E — III. FUMAROLES OF THE LAVAS.
Robert Mallet translation
Cotunuite, chloride of lead, in white, lustrous, acicular crystals, of the trimetric system, easily scratched, Sp. gr., 5·238.
Tenorite, peroxide of copper, in thin, hexagonal plates or scales, translucent when very thin, dark steel gray, of the cubic system; hard and lustrous. Sp. gr. about 5·950.—Translator.