HAIR TONICS.--Hair tonics serve for cleansing and invigorating the scalp and for preventing the hair from falling out. Glycerin having a beneficial effect upon the scalp is much used as one of the constituents. The tonics also frequently contain ingredients said to promote the growth of the hair, such as Peruvian bark extract, quinine, tincture of cantharides, and substances containing tannin. Hair tonics containing tincture of cantharides should, however, not be too frequently used, as otherwise an excessive stimulation of the scalp might be the result, which would be more injurious than beneficial to the growth of the hair. Some receipts for hair tonics are here given. _Eau Athénienne._--Alcohol of best quality 8 quarts, vanilla tincture 1¼ lb., cumarin tincture 7 ozs., bergamot oil 3½ ozs., rose-geranium oil 11 drachms, clove oil 14 drachms. After 8 days, add 1 quart of rose water and mix thoroughly. _Florida water No. 1._--Alcohol 50 quarts, best lavender oil 3 lbs., bergamot oil 1 lb., African rose-geranium oil ½ lb., tinctures of sanders-wood and turmeric each 11 drachms, distilled water 16 quarts. The alcohol, volatile oils, and tinctures are intimately mixed in a glass balloon, then allowed to stand two to three weeks when the distilled water is added and the whole vigorously agitated. After adding the water the fluid becomes very turbid and requires several weeks to clarify. It is then filtered through paper. If, notwithstanding filtering, it should remain somewhat turbid, bring a small quantity of carbonate of magnesia upon the filter. _Florida water No. 2._--Alcohol 25 quarts, lavender oil 7 ozs., palmarosa oil 8 ozs., Portugal oil and red thyme oil each 3½ ozs., tinctures of sanders-wood and turmeric each 5½ drachms, rain-water 10 quarts. Proceed in the same manner as given for Florida water No. 1. _Eau de Cologne hair tonic._--Alcohol 8 quarts, oils of bergamot and lemons each 1¼ ozs., lavender oil 11 drachms, rosemary oil 5½ drachms, glycerin of 28° B. 3½ ozs. After 8 days add 7 ozs. of bicarbonate of soda dissolved in 2½ quarts of distilled water. _Eau de quinine._--Alcohol of best quality 20 quarts, tinctures of gall-nuts and Peruvian bark each 2 quarts, vanilla tincture 1 quart, bergamot oil 7 ozs., African rose-geranium oil 3½ ozs., clove oil 14 drachms, glycerin of 28° B. 3 lbs., Panama wood 4 lbs., boiled with filtered rain-water 12 quarts, bicarbonate of soda 1 lb. dissolved in 1 quart of water. The alcohol, tinctures, and volatile oils are brought into a glass balloon and after vigorous agitation allowed to stand 8 days for the volatile oils to dissolve. The decoction of Panama wood is then added, next the bicarbonate of soda solution, and finally the whole is thoroughly agitated. The Panama-wood decoction should not be added while hot, as otherwise the glass balloon might burst. Color the water with cochineal tincture or henna tincture.