[205] The two ancient glasses found at Nismes, and described in Caylus’ Recueil d’Antiquités, ii. p. 363, were probably of this sort.
[206] Natter, Traité de la Méthode antique de graver en Pierres fines, comparé avec la Méthode moderne. Lond. 1754, fol.
[207] Of this kind were the calices audaces of Martial, xiv. 94, and those cups which often broke when the artist wished to give them the finishing touch.
[208] See Sandrart’s Teutsche Akademie, vol. i. part 2, p. 345, where there is much valuable information respecting the German artists. Compare also Doppelmayer’s Nachricht von Nürnberg. Künstlern.
[209] Oculus Artificial. iii. p. 79.
[210] Lib. xxxvii.
[211] Cap. 52, p. 59.
[212] Origin. xvi. 8.
[213] De Miner. lib. ii. 2.
[214] Traité des Pierres gravées, i. pp. 90, 156.