[166] Goguet, ii. p. 111. Fabricii Biblioth. Græca. vol. i. p. 70.
[167] Keyssler, i. pp. 17 and 441.
[168] Lib. xxxvii. cap. 7.
[169] De Lapid. § 61.
[170] [This stone acquired its name from its being much used in ornaments by the Incas or Princes of Peru.]
[171] De la Vega, ii. 28.
[172] Montamy in Abhandlung von den Farben zum Porzellan, Leipzig, 1767, 8vo, p. 222, asserts that he saw, in a collection of antiquities, glass mirrors which were covered behind only with a black foil.
[173] Lib. xxxvi. cap. 26, p. 758.
[174] Lib. xxxiii. cap. 9, p. 627.
[175] Trebell. Pollio, Vita Gallien. cap. 12.