Mix and distil five pints for sale. Such essence of lavender is expensive, but at 10_s._ a pint of 14 oz! there _is_ a margin for profit. It not being convenient to the general dealer to sell distilled lavender essence, the following form, by mixture, will produce a first-rate article, and nearly as white as the above. ESSENCE OF LAVENDER. Otto of lavender, 3-1/2 oz. Rectified spirit, 2 quarts. The perfumer's retail price for such quality is 8_s._ per pint of 14 oz. Many perfumers and druggists in making lavender water or essence, use a small portion of bergamot, with an idea of improving its quality--a very erroneous opinion; moreover, such lavender quickly discolors. LAVENDER WATER.--Take: English oil of lavender, 4 oz. Spirit, 3 quarts. Rose-water, 1 pint. Filter as above, and it is ready for sale. COMMON LAVENDER WATER.--Same form as the above, substituting French lavender for the British. Recipes for Rondeletia, Lavender Bouquet, and other lavender compounds, will be given when we come to speak of compound perfumes, which will be reserved until we have finished explaining the method of making the simple essences. LEMON.--This fine perfume is abstracted from the _Citrus limonum_, by expression, from the rind of the fruit. The otto of lemons in the market is principally from Messina, where there are hundreds of acres of "lemon groves." Otto of lemons, like all the ottos of the Citrus family, is rapidly prone to oxidation when in contact with air and exposure to light; a high temperature is also detrimental, and as such is the case it should be preserved in a cool cellar. Most of the samples from the gas-heated shelves of the druggists' shops, are as much like essence of turpentine, to the smell, as that of lemons; rancid oil of lemons may, in a great measure, be purified by agitation with warm water and final decantation. When new and good, lemon otto may be freely used in combination with rosemary, cloves, and caraway, for perfuming powders for the nursery. From its rapid oxidation, it should not be used for perfuming grease, as it assists rather than otherwise all fats to turn rancid; hence pomatums so perfumed will not keep well. In the manufacture of other compound perfumes, it should be dissolved in spirit, in the proportion of six to eight ounces of oil to one gallon of spirit. There is a large consumption of otto of lemons in the manufacture of Eau de Cologne; that Farina uses it is easily discovered by adding a few drops of Liq. Ammoniae fort. to half an ounce of his Eau de Cologne, the smell of the lemon is thereby brought out in a remarkable manner. Perhaps it is not out of place here to remark, that in attempts to discover the composition of certain perfumes, we are greatly assisted by the use of strong Liq. Ammoniae. Certain of the essential oils combining with the Ammonia, allow those which do not do so, if present in the compound, to be smelt.