inclined to technical speculation. After which Claude, impelled by the exuberance of his passion, took to exaggerating the scientific principles whereby, from the three primitive colours, yellow, red, and blue, one derives the three secondary ones, orange, green, and violet, and, further, a whole series of complementary and similar hues, whose composites are obtained mathematically from one another. Thus science entered into painting, there was a method for logical observation already. One only had to take the predominating hue of a picture, and note the complementary or similar colours, to establish experimentally what variations would occur; for instance, red would turn yellowish if it were near blue, and a whole landscape would change in tint by the refractions and the very decomposition of light, according to the clouds passing over it. Claude then accurately came to this conclusion: That objects have no real fixed colour; that they assume various hues according to ambient circumstances; but the misfortune was that when he took to direct observation, with his brain throbbing with scientific formulas, his prejudiced vision lent too much force to delicate shades, and made him render what was theoretically correct in too vivid a manner: thus his style, once so bright, so full of the palpitation of sunlight, ended in a reversal of everything to which the eye was accustomed, giving, for instance, flesh of a violet tinge under tricoloured skies. Insanity seemed to be at the end of it all.