until it is extremely fine. Thus prepared, it is put into a tub with a slimy infusion of rice and a root called oreni; then it is stirred until the ingredients are properly blended: it is next removed to a large vessel to admit of moulds being dipped into it. These moulds are made of bulrushes cut into narrow strips, and mounted in a frame; as the paper is moulded, the sheets are placed on a table covered with a double mat. The sheets are laid one on the other, with a small piece of reed between; and this, standing out a little way, serves afterwards to lift them up leaf by leaf. Every heap is covered with a board and weights to press out the water; on the following day, the sheets are lifted singly by means of the projecting reeds, and are placed on a plank to be dried in the sun. This paper is so delicate that only one side can be written on; but the Chinese sometimes double the sheets, and glue them together so neatly that they appear to be a single leaf. This manufacture of the Chinese extended also to the making of sheets of paper from old rags, silk, hemp, and cotton, as early as the second century of the Christian era, and is supposed to have been the source whence the Arabs obtained their knowledge of paper-making. The latter people first introduced the valuable art of making paper from cotton into Europe, in the earlier half of the twelfth century, and established a paper manufactory in Spain. In 1150, the paper of Xativa, an ancient city of Valencia, had become famous, and was exported to the East and West. Notwithstanding its fame, this paper was of a coarse and inferior quality, so long as its manufacture was confined solely to the Arabs, in consequence of their employing only mortars, and hand or horse-mills for reducing the cotton to a pulp; but when some Christian laborers obtained the management of the mills of Valencia and Toledo, the different processes of the manufacture were greatly improved. Cotton paper became general at the close of the twelfth and beginning of the thirteenth centuries; but, in the fourteenth century, it was almost entirely superseded by paper made of hemp and linen rags. The paper made of cotton was found not to possess sufficient strength or solidity for many purposes; a very strong paper was therefore made of the above substances, not weakened by bleaching, according to the present mode, which, by removing the natural gum, impairs the strength of the vegetable fibre. Some of these old papers, having been well sized with gelatin, are said to possess their original qualities even to this day.