The third, or finished painting, is commenced by wiping and oiling the picture in the manner before described as necessary for the second painting. We then proceed to complete the details of form and color, which were brought forward in the former painting, employing for this purpose delicate touches of glazing and scrambling alternately, not to conceal, but improve and render as perfect as possible what has already been done. Sharp, vigorous touches where the markings of the details require them. These touches must be made with freedom and decision, or they fail in producing the desired effect. They should be of a warm tone, not cold—not grey. In this stage of the work do not attempt too much at one sitting. It is best to allow the colors to dry gently, and to repeat the operation when necessary.

Lastly, a mode of aiding the finish is by passing over a portion of the work with light, delicate tones, which are left only on the projecting touches of texture objects.

MATERIALS USED.

Many of the pigments which change color by the action of impure air, and are, therefore, useless in water-color painting, may, nevertheless, be safely used in oil painting; for this reason: In water color the powder colors are mixed with only just enough of some binding cement (called a vehicle), such as gum, size, sugar, etc., to prevent their being easily rubbed off the paper, and are, therefore, freely exposed to the action of the atmosphere, or of the colors with which they may be mixed; but in oil colors the powder colors are ground up in oil, so prepared as to oxidise rapidly in the air into a kind of impermeable leathery resin, which, completely enveloping each particle of color, effectually protects it, not only from the action of impure air, but also of neighboring particles of different colors. And it thus happens that pigments may be used in oils with tolerable safety which in water color might turn black in a few days. Indeed, the white which we invariably use in oils—flake white—is certainly one of the most unstable of colors in water colors; and nearly the same may be said of the chrome yellow, Naples yellow, emerald green, etc.

The colors named below will be found a useful set:

Flake White,

Ultramarine,

Prussian Blue,

Yellow Ochre,

Carmine (in Powder)*