TO DESTROY BED BUGS EFFECTUALLY.—Take two ounces of quicksilver, and the whites of two eggs, and so on in this ratio for a larger or smaller quantity. Beat the quicksilver and the whites together until they unite and become a froth. With a feather then apply the compound thus formed to the crevices and holes in your bedsteads. This done once or twice in a year will prove effectual.—J. M. POISON FOR BUGS.—Spirits of wine and spirits of turpentine, of each four ounces; white mercury and camphor, of each half an ounce: mix. A chemist will make it up; and it must be applied with a brush to the bedstead or box infested by the insects.—J. D. TO MAKE BOTTLES AIR-TIGHT.—This may be done without luting or grinding, and consists in only having a groove round the neck, into which the cap fits, so that the groove may be charged with water or mercury. TO BOTTLE PORTER.—To four gallons of porter take three-quarters of a pound of coarse sugar, boil it in three quarts of water five minutes, when cool, add a tea-cup of fresh yeast. Let it work till it creams over, then put the porter to it, and bottle off.—Mrs. H. TO MAKE GLUE THAT WILL RESIST MOISTURE.—Dissolve gum sandarac and mastic, of each two ounces, in a pint of spirit of wine, adding about an ounce of clear turpentine. Then take equal parts of isinglass and parchment glue, and having beaten the isinglass into small bits, and reduced the glue to the same state, pour the solution of the gums upon them, and melt the whole in a vessel well covered, avoiding so great a heat as that of boiling water. When melted, strain the glue through a coarse linen cloth, and then put it again over the fire, adding about an ounce of powdered glass. This preparation may be best managed by hanging the vessel in boiling water, which will prevent the matter burning the vessel, or the spirit of wine from taking fire; and, indeed, it is better to use the same method for all the evaporations of nicer glues and sizes; but in such cases, less water than the proportion directed should be added to the materials.—J. M. CEMENT FOR IRON KITCHEN UTENSILS.—Take six parts of potter’s clay, and one part of steel filings, mix them together with a sufficient quantity of linseed oil to make a thick paste of the consistence of glazier’s putty; then apply it to the cracked parts, on both sides, and let it stand three or four weeks undisturbed. JAPANESE CEMENT.—This cement is made by mixing rice flour intimately with cold water, and then gently boiling it; it is beautifully white, and dries almost transparent. Papers pasted together by means of this cement, will sooner separate in their own substance than at the joining.