5 JO On the Art of Painting 



paper, -which contains a minute comparifon of 

 the ancient with the modern pigments. It is 



alfo 



infefted in the prefent volume) I find, that of luhite 

 colouring fubftances, the ancients had white lead varioufly 

 prepared, a white from calcined egg-ftiells, and prepara- 

 tions from cretaceous and argillaceous earths. The 

 moderns, in addition, have magillery of bifmuth, little 

 ufed ; and ought to have, the calces of tin and zinc. 



Of blacks, the ancients had preparations fimilar to lamp, 

 ivory, blue and Franckfort black : alfo to Indian ink, and 

 common writing ink, and they ufed what we do not, the 

 precipitate of the black dyers' vats. Black chalk and 

 black lead were, as I think, unknown to them. 



The ancients poflefTed a fpecles of vermilion or fine 

 cinnabar, a coarfer cinnabar, red lead, various reddles 

 burnt and unburnt, apparently fimilar to our red oker, 

 Venetian red, Indian red, Spanilh brown, burnt Terra 

 di Sienna and fcarlet oker : they had alfo a fubftance 

 alike in colour and in name to our dragon's blood. 

 Their minium was not red lead, but native vermilion or 

 very fine cinnabar. Their red lead went under the names 

 of minium fecundarium, i^ cerujfa ufia. They had not car- 

 mine or rofe pink, nor the lakes from kermes, cochineal, 

 or brazil ; although they appear to have had the cochi- 

 neal infeft and the kermes berry. They were alfo accuf-' 

 tomed to tinge calcareous and margaceous earths red, a 

 praftice which we do not ufe but for yellows. 



The yellow pigments of the ancients were generically 

 the fame with our orpiments, king's yellow, Naples 

 yellow, malRcot and the yellow okers of various denomi- 

 nations, as well as the calcareous earths tinged yellow. 

 They did not poflefs turbith mineral, mineral yellow, or 

 gamboge, nor do they appear to have known of gall-Hone 

 as a pigment. 



Of 



