is formed by compounding black and blue, black and purple, black and olive, &c.; and is likewise produced by adding blue in excess to madder brown, sepia, &c., transparent mixtures which are much employed. It should be borne in mind that the semi-neutrals, like the secondaries and tertiaries, may be so compounded as to be permanent, semi-stable, or fugitive. The due remembrance of this cannot be too strongly insisted upon, seeing that in every picture the browns and grays are of frequent occurrence. These it is that lend such charm to the whole, flowing, as it were, like a quiet under-current of colour beneath the troubled surface of more decided hues. In the work of every true artist--between whom and the mere painter there is as much difference as between the poet and the poetaster--there is sentiment as well as colour, whether the subject be an exciting battle-scene or a bit of still life. This sentiment, as strongly felt as the colour is clearly seen, is imparted in no small degree by the skilful use of semi-neutrality, the compounding of which, as time goes on, will therefore affect a picture for good or for evil. Subjoined is an analysis of the three semi-neutrals, which serves partly to show in what great variety they may be obtained by admixture. Brown = Black + Yellow } " = " + Orange } + Red, Purple, &c. " = " + Citrine} " = 2 Yellow + Red + Blue " = 2 Orange + Green + Purple " = 2 Citrine + Russet + Olive Marrone = Black + Red " = " + Purple-red " = " + Russet " = 2 Red } " = 2 Purple-red} + Dark Brown or Black " = 2 Russet } Gray = Black + Blue } " = " + Purple-blue} + 2 White " = " + Olive } " = 2 Blue } " = 2 Purple-blue} + Light Brown, or Black + 2 White " = 2 Olive } In the last division, the White has been added to remind the reader that grays are coloured greys, not coloured blacks; and are therefore faint of hue. This paleness, however, need not necessarily be produced by admixture with white: it can be gained by means of thin washes. As a pigment, gray may be to all appearance black in bulk. 285. NEUTRAL TINT,