This famous perfume, which was first made in Cologne on the Rhine, its formula being kept secret, can be produced anywhere of the same quality as the original. In order to obtain a first-class product, it is necessary, besides using the finest oils—a matter of course for all fine perfumes—to observe another special point. Every Cologne water contains oils of the citron group which develop their best odors only in true spirit of _wine_. Unless an alcohol distilled from _wine_ is used, it will be impossible to make a Cologne water of really first quality. While it is possible to make a good cologne with grain or potato spirit, especially if highly rectified, comparison with one prepared from pure spirit of _wine_ will at once show a marked difference. The small amount of œnanthic ether, hardly demonstrable by chemical tests but present in every spirit of wine, exerts a decided influence on the flavor. Cologne water of the most superior and incomparable quality is made by dissolving the essential oils, excepting the oils of rosemary and neroli, in the alcohol and distilling it, the other oils being added to the distillate. A very large number of formulas for the preparation of Cologne water have been published of which we subjoin a few. We have purposely omitted those containing many essential oils, as experience has taught us that they are of little value; for it is not the number of oils that determines the fineness of a perfume, but the manner in which certain odors are combined. A. FINEST COLOGNE WATER (EAU DE COLOGNE SUPÉRIEURE). Oil of bergamot 2½ oz. Oil of lemon (hand-pressed) 6 oz. Oil of neroli pétale 3½ oz. Oil of neroli bigarade 1¼ oz. Oil of rosemary 2½ oz. Alcohol 30 qts. B. COLOGNE WATER (SECOND QUALITY). Oil of bergamot 4½ oz. Oil of lemon 4½ oz. Oil of neroli pétale ¾ oz. Oil of orange peel 4½ oz. Oil of petit grain 2½ oz. Oil of rosemary 2½ oz. Alcohol 30 qts. C. COLOGNE WATER (ORDINARY). Oil of bergamot 7 oz. Oil of lemon 3½ oz. Oil of lavender 3½ oz. Alcohol 30 qts. D. COLOGNE WATER. Oil of bergamot 1¾ oz. Oil of lemon 3½ oz. Oil of lavender 150 grains. Oil of neroli ½ oz. Oil of rosemary 75 grains. Alcohol 30 qts. E. COLOGNE WATER. Oil of bergamot 2 oz. Oil of lemon 1 oz. Oil of lavender ½ oz. Oil of melissa ¼ oz. Oil of neroli ¼ oz. Alcohol 30 qts. F. COLOGNE WATER. Oil of bergamot 3½ oz. Oil of lemon ½ oz. Oil of lavender ¼ oz. Oil of melissa ½ oz. Oil of neroli ¼ oz. Alcohol 30 qts. G. COLOGNE WATER.