WATERPROOF CLOTH.—Brush the cloth first with a solution of isinglass, and when dry with a solution of nutgalls. This last solution changes the gelatinous mass of isinglass into a true leather. Instead of isinglass use common glue and afterwards a tincture or infusion of catechu. These receipts will scarcely do with light colours. Rub the cloth over on the wrong side with India-rubber varnish, or India-rubber dissolved by heat in spirits of turpentine. Brush over the wrong side of the cloth with a solution of isinglass, alum, and soap. Brush over the wrong side with soap-suds, and afterwards with a solution of alum. A FIREPROOF AND WATERPROOF CEMENT.—To half a pint of milk put an equal quantity of vinegar, in order to curdle it; then separate the curd from the whey, and mix the whey with the whites of four or five eggs, beating the whole well together. When it is well mixed, add a little quick-lime through a sieve, until it has acquired the consistence of a thick paste. With this cement, broken vessels and cracks of all kinds may be mended. It dries quickly, and resists the action of fire and water. I have recommended this receipt to several friends, who have found it very satisfactory.—H. CHINESE METHOD OF WATERPROOFING CLOTH.—By the following very simple process it is said that the Chinese render not only the strongest cloth, but even the finest muslin, waterproof, without injuring the appearance or quality of the article. The composition is composed of half an ounce of white wax in a pint of spirits of turpentine. In a sufficient quantity of the mixture immerse the goods intended to be rendered waterproof, and then hang them in the open air till they become perfectly dry. This is all the process necessary for accomplishing so desirable a purpose; against which, however, may be objected, perhaps, the expense, and the unpleasant smell of the turpentine. But this latter objection can be remedied by using equal parts of spirits of wine and oil of wormwood, which is said to dissipate the smell of the turpentine; but the former, it is not to be denied, must necessarily be augmented.—[A. P. has favoured us with the above, but has not tried it.]