Some may possibly say, that photography, casting, and stenography are mechanical processes, and that we ought to leave mechanism out of the question, and accordingly limit our comparisons to man's work. Let us, therefore, select works by artists conspicuous for minute fidelity. There is a canvas in the Louvre by Denner. This artist worked microscopically, taking four years to finish a portrait. Nothing in his heads is overlooked--the finest lines and wrinkles, the faintly mottled surface of the cheeks, the black specks scattered over the nose, the bluish flush of imperceptible veins meandering under the skin, nor the reflection of objects in the vicinity on the eye. We are struck with astonishment. This head is a perfect illusion; it seems to project out of the frame. Such success and such patience are unparalleled. Substantially, however, a broad sketch by Van Dyck is a hundredfold more powerful. Beside, neither in painting nor in any other art are prizes awarded to deceptions. A second and stronger proof, that exact imitation is not the end of art, is to be found in this fact, that certain arts are purposely inexact. There is sculpture, for instance. A statue is generally of one color, either of bronze or of marble; and again, the eyes are without eyeballs. It is just this uniformity of tint, and this modification of moral expression, which completes its beauty. Examine corresponding works, in which imitation is pushed to extremity. The churches of Naples and Spain contain draped statues, colored; saints in actual monastic garb, with yellow earthy skins, suitable to ascetics, and bleeding hands and wounded sides characteristic of the martyred. Alongside of these appear madonnas, in royal robes, in festive dresses, and in bright silks, crowned with diadems, wearing precious necklaces, brilliant ribbons, and magnificent laces, and with rosy complexions, glittering eyes, and eyeballs formed of carbuncles. By this excess of literal imitation, the artist gives no pleasure, but repugnance, often disgust, and sometimes horror.