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coat, and afterwards, the third which is finer in texture.After this preparation, and a careful polishing of thework, the colours which it is to receive are to he consi-dered, so that thfey may he brilliant. Their variety andthe method of preparing them will be found in the fol-lowing pages.

CHAPTER VII.

OF NATURAL COLOURS.

Some are found in certain places in a native state, andthence dug up, whilst others are composed of differentsubstances, ground and mixed together, so as to answerthe same purpose. First we shall explain the natureof that which is found native, called by the Greekswxpa. This, as in Italy, is discovered in many places,but the best is the Attic sort, which cannot now beprocured, for in working the silver mines at Athens, ifby chance they fell upon a vein of ochre, they followedit up just as they would one of silver. Hence the an-cients used abundance of ochre in their finishings. Redochre is also found in many places, but the best only ina few, as at Sinope, in Pontus; in Egypt; in the BalearicIslands, near the coast of Spain; also in Lemnos, therevenue of which island the senate and people of Romegranted to the Athenians. The Parsetonion takes itsname from the place where it is dug up. The Melinonon a similar account is so called, from its abundance inMelos, one of the Cyclades. Green chalk is also foundin many places ; but the best comes from Smyrna, and iscalled by the Greeks OeoSonov, because Theodotus was theowner of the land in which it was first discovered. Or-piment, which is called dpcreWov in Greek, is obtainedfrom Pontus, Red lead is also obtained from many

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