525. _To darken the Eye-brows._--Take an ounce of walnuts, an ounce of frankincense, an ounce of resin, and an ounce of mastick. Burn them all on clear, red-hot charcoal, and receive the fumes into a funnel, in which a very fine black powder, slightly perfumed and unctuous, will adhere. Mix this with a little oil of myrtle, in a leaden mortar, and apply it to the eye-brows. This paste has the property of resisting both heat and perspiration; but it must be occasionally renewed. The following method may also be used: Burn a clove in the flame of a wax-candle, dip it into the juice of elder-berries, and apply it to the eye-brows. The powder, also, which is used in the East for painting the eye-lashes, and which is composed of antimony and bismuth, may be safely and advantageously used. Or, a paste prepared from powdered black lead, with eau de Cologne, or oil of myrtle, or essence of bergamot, will suffice for the purpose. When the eye-brows become long and shaggy, they give a ferocious and repulsive expression to the countenance. The scissors should in that case be often used. Some of the longest hairs might also be removed with the tweezers. 526. _To know whether Hair Powder is adulterated with Lime._--Put a little crude sal-ammoniac, in powder, to the suspected hair powder, and add a little warm water to the mixture, and stir it about; if the powder has been adulterated with lime, a strong smell of volatile alkali will arise from this mixture. 527. _To perfume Hair Powder._--Take one drachm of musk, four ounces of lavender blossoms, one and a half drachm of civet, and half a drachm of ambergris; pound the whole together, and pass it through a sieve. Preserve this mixture in well-stopped bottles, and add more or less thereof, as agreeable, in your hair powder. 528. _To improve the Hair._--Powdered hartshorn, mixed with oil, being rubbed upon the head of persons who have lost their hair, will cause it to grow again. A very good oil for the hair is made by mixing one part of the liquid hartshorn with nine parts of pure castor-oil. 529. _An economical Hair Wash._--Dissolve in one quart of boiling water one ounce of borax and half an ounce of camphor; these ingredients fine. When cool, the solution will be ready for use. Damp the hair with it frequently. This wash not only cleanses and beautifies, but strengthens the hair, preserves the color, and prevents baldness.