small quantity in figures or other minor accessaries.
Pictures executed on such a system are not, properly speaking, works in color at all; they are studies of light and shade, in which both the shade and the distance are rendered in the general hue which best expresses their attributes of coolness and transparency; and the lights and the foreground are executed in that which best expresses their warmth and solidity. This advantage may just as well be taken as not, in studies of light and shadow to be executed with the hand; but the use of two, three, or four colors, always in the same relations and places, does not in the least constitute the work a study of color, any more than the brown engravings of the "Liber Studiorum"; nor would the idea of color be in general more present to the artist's mind, when he was at work on one of these drawings, than when he was using pure brown in the mezzotint engraving. But the idea of space, warmth, and freshness being not successfully expressible in a single tint, and perfectly expressible by the admission of three