[1909] See B. ii. c. 29. Sepia, for sepic drawing, is now prepared from these juices.
[1910] In Chapter [12] of this Book.
[1911] Plate powder. See B. xvii. c. 4, and Chapter [58] of this Book.
[1912] See B. ix. c. 60.
[1913] See B. ix. c. 65, and B. xxi. cc. 38, 97. According to Vitruvius, it is a colour between scarlet and purple. It may possibly have been made from woad.
[1914] See B. iii. c. 16.
[1915] See B. xxxiii. c. [57].
[1916] White of egg, probably.
[1917] Indigo, no doubt, is the colour meant. See B. xxxiii. c. [57].
[1918] It is the produce of the Indigofera tinctoria, and comes from Bengal more particularly. Beckmann and Dr. Bancroft have each investigated this subject at great length, and though Pliny is greatly mistaken as to the mode in which the drug was produced, they agree in the conclusion that his “indicum” was real indigo, and not, as some have supposed, a pigment prepared from isatis, or woad.