[901] “Auripigmentum.” Yellow sulphuret of arsenic. See B. xxxiv. c. [56].
[902] “Lapis specularis.” See B. xxxvi. c. [45].
[903] Caligula.
[904] It was accidently mixed with the ore of arsenic, no doubt, unless, indeed, the emperor was imposed upon.
[905] This is almost, but not quite, universally the case.
[906] In Spain. See B. iii. c. 4, B. iv. c. 34, and B. ix. c. 2. The locality alluded to is now unknown.
[907] A name also given by the ancients to amber. Artificial “electrum,” or gold alloyed with silver, was known in the most ancient times.
[908] The gold found by sinking shafts. See Chapter [21].
[909] See B. ix. c. 65.
[910] Od. B. iv. l. 71.