[2493]. See generally Blümner, Technologie, iii. p. 161 ff.; Middleton, Remains of Ancient Rome, i. p. 80.
[2494]. Archaeologia, li. pl. 3.
[2495]. Buckman and Newmarch, Roman Art in Cirencester, p. 64.
[2496]. H.N. xxxv. 165; xxxvi. 188: cf. Geoponica, ii. 27, 5; Pallad. i. 9, 4; Cato, Agric. xviii. 7; Vitr. vii. 1, 4; Columella, i. 6, 13; viii. 15, 3, 17, 1; ix. 1, 2.
[2497]. Middleton, op. cit. ii. p. 121, fig. 65.
[2498]. Cf. Buckman and Newmarch, Roman Art in Cirencester, p. 49 ff.
[2499]. Vitr. vii. 1, 4; Pliny, H.N. xxxvi. 184; Stat. Silv. i. 3, 54.
[2500]. Archaeologia, xxvi. pl. 44, p. 370.
[2501]. Roach-Smith, Ill. Rom. Lond. p. 113.
[2502]. C.I.L. vii. 1223-24.