Note 2775 — BOOK XXXVI. THE NATURAL HISTORY OF STONES. (continued 2)

Beckmann says, in reference to this passage, supposing that a kind of spar is meant by the word phengites—“It is probable that the openings of the walls of the building where the windows used to be, were in this instance filled up with phengites. which, by admitting a faint light, prevented the place from being dark, even when the doors were shut.”— Hist. Inv. Vol. II. p. 66. Bohn’s Edition.