CHAP. 23.—SANDYX.
Calcined with an equal proportion of rubrica, sandarach forms sandyx;1 although I perceive that Virgil, in the following line,2 has taken sandyx to be a plant—"Sandyx itself shall clothe the feeding lambs." The price of sandyx3 is one half that of sandarach; these two colours being the heaviest of all in weight.