As criticism comes naturally after poetry, so science succeeds a great exhibition of art. A close and profound analogy exists between them, and in this order. Genius spontaneously executes great, curious, and beautiful works, before scientific reason pauses to sit in judgment upon the principles according to which the artistic processes were conducted. Expert workers in brass and iron existed long before the chemistry of metals was known, as wine sparkled in crystal and golden goblets before vinous fermentation formed a chapter of science. Pyramids and cromlechs were raised into the air in cyclopian massiveness, before a theory of mechanical powers had been defined. Dyeing was early in use with the Hindoos, from whom the Egyptians learned the art, as they did that of calico printing. That was one of the many varieties of practical science which certainly came from the remote East. Paper making was first known in India, where, for a long time, it was formed of cotton and other substitutes for hemp and flax. In the Himalayas, it is still manufactured of the inner bark of trees, and in sheets of immense size. The invention of a loom, and the common mode of weaving, is alluded to in the Rig Veda, B.C. 1200 years. The Institutes of Manu, say: "Let a weaver who has received ten palas of cotton thread, give them back, increased to eleven by rice-water and the like used in weaving." But the nurses of infant science on the banks of the Ganges, the Euphrates, and the Nile, enslaved it to their own superstitions, and forever arrested its growth at the immutable boundary of their own contracted technicalities. So little real skill did the Egyptians possess, that it was necessary for Thales to show them how to find the height of the pyramids by the length of their shadows. Osiris was a king of that mummified land, and the historical course of science was foretokened by the fabulous account respecting him. Diodorus states that he passed through Ethiopia, Arabia, India, and Asia; crossed the Hellespont into Europe, and went from Thrace to western Greece, and the nations beyond, teaching them agriculture, and the cultivation of the vine. This was unquestionably invented after the Egyptian priesthood had received much information from the Greeks, and had become ashamed of their own gods, who had always confined their beneficent acts entirely to the borders of the Nile. Nevertheless, the statement is interesting, as it indicates the natural course of improvement.