191. 1. _Yellow and Blue._ The arrangement of _yellow_ and _blue_ is more agreeable than that of _yellow_ and _green_, but it is less lively. 2. The arrangement _white, yellow, blue, white_, &c., is perhaps preferable to the preceding. 3. The arrangement _white, yellow, white, blue_, &c., is perhaps inferior to the preceding. 192. 1. _Green and Blue_ produce an indifferent effect, but better when the colours are deep. 2. The arrangement _white, green, blue, white_, &c., is preferable. 3. The arrangement _white, green, white, blue, white_, &c., has a still better effect, because the light is more equally distributed. 193. 1. _Green and Violet_, especially when light, form a combination preferable to the preceding, _green_ and _blue_. 2. The arrangement _white, green, violet, white_, &c., is not decidedly superior to the preceding. 3. The arrangement, _white, green, white, violet, white_, &c., is not decidedly superior to it. 194. 1. _Blue and Violet_ accord badly. 2. The arrangement, _white, blue, violet, white_, &c. is scarcely preferable to the preceding (1). 3. The arrangement _white, blue, white, violet, white_, &c., is not so bad as the preceding (2). ARTICLE II. _Colours and Black._ Plate 9. (Frontispiece.) 195. I do not know whether the use of black for mourning, prevents the use of it, in numberless cases, where it would produce excellent effects; it may be combined most advantageously, not only with sombre colours to produce the harmony of analogy, but also with light and brilliant colours to produce the harmony of contrast. 196. Chinese artists appear to have made excellent use of it, for I have often seen furniture, painting, ornaments, &c., where it has been most judiciously employed. I recommend those artists for whom this paragraph is particularly designed, to attend to the following observations, not doubting that many will be profitable to them. A. _Binary Combinations._ 197. No combination of primary colours with black is disagreeable, but there exists among these a generic difference of harmony, which is not shown, at least to nearly the same degree, in the binary combinations of white with the same colours. In fact the brilliancy of white is so predominant, that whatever may be the difference of lightness or brilliancy observed between the various associated colours, there will always be the harmony of contrast, according to what has been said (44-52) of the influence of white in raising the tone and augmenting the intensity of the colour adjacent to it.