V. Alcohol 8 ozs., oil of bay 2 drachms, oil of cloves 1 drop, mace 20 grains, water warmed to 80° F. to make 12 ozs. Dissolve the oils in the alcohol, digest the mace in the solution for a few days, filter and add the water. The whole is allowed to stand, with occasional agitation, for several days, and filtered through magnesia. VI. Jamaica rum 36 ozs., 95 per cent. alcohol 36 ozs., oil of bay ½ oz., oil of pimento 1 drop, acetic ether 4 drops. Allow to stand at least 3 weeks before using. HAIR DYES.--The requirements of a good hair-dye are that it can be readily applied, that it contains no injurious substances, and that the coloration be as natural and durable as possible. These demands are difficult to fulfil, and it cannot be said that there is one of the ordinary hair dyes which in every respect comes up to them. Black hair dyes give the most natural coloration, but the peculiar shade of blue-black hair cannot be imitated. The medium colors, light brown and blonde, are the least natural. Most dyes allow of rapid coloration, though, in order to make the deception more complete, a gradual coloration is by many persons preferred. Such gradual, though only very slightly darker coloration, is attained by the use of hair oils and certain animal fats containing a slight content of sulphur or iron, such as freshly expressed egg oil and neat's-foot oil. It was formerly believed that egg oil, if used in time, would even prevent the hair from turning gray. The gradual darkening of the hair may also be effected by agents, which are converted into colored combinations only by the atmospheric oxygen or the content of sulphur in the hair, such as extract from nut shells, tannin, pyrogallic acid and many metals, the latter chiefly in the form of pomades or hair oil. Dilute acids used for some time make the hair somewhat lighter. Mothers wishing to keep the hair of their children blonde, avoid oils, and frequently wash the heads of the children with vinegar or lemon juice. No coloration is, however, durable; it becomes in the course of time gradually weaker, and the new growth of hair always requires after-coloration.