[Footnote 148: See Lucian (in Eunuch. tom. ii. p. 350 - 359,
edit. Reitz,) Philostratus (in Vit. Sophist. l. ii. c. 2,) and
Dion Cassius, or Xiphilin, (lxxi. p. 1195,) with their editors Du
Soul, Olearius, and Reimar, and, above all, Salmasius, (ad Hist.
August. p. 72.) A judicious philosopher (Smith's Wealth of
Nations, vol. ii. p. 340 - 374) prefers the free contributions of
the students to a fixed stipend for the professor.]