_Singapore Citronella Oil._--Specific gravity at 15 deg. C., 0.890-0.899; optical rotation, usually slightly laevo-rotatory up to -3 deg.; refractive index at 20 deg. C., 1.467-1.471; soluble in 1 to 1.5 volumes of 80 per cent. alcohol; total acetylisable constituents, calculated as geraniol, 80-90 per cent. _Java Citronella Oil._--Specific gravity at 15 deg. C., 0.890-0.901; optical rotation, -1 deg. to -6 deg.; total acetylisable constituents, calculated as geraniol, 75-90 per cent.; soluble in 1-2 volumes of 80 per cent. alcohol. The chief constituents of the oil are geraniol, citronellal, linalol, borneol, methyl eugenol, camphene, limonene, and dipentene. It is very largely used for perfuming cheap soaps, and also serves as a source for the production of geraniol. _Bois de Rose Femelle oil_, or _Cayenne linaloe oil_, distilled from wood of trees of the Burseraceae species. Specific gravity at 15 deg. C., 0.874-0.880; optical rotation, -11 deg. 30' to -16 deg.; refractive index at 20 deg. C., 1.4608-1.4630; soluble in 1.5 to 2 volumes of 70 per cent. alcohol. The oil consists almost entirely of linalol, with traces of saponifiable bodies, but appears to be free from methyl heptenone, found by Barbier and Bouveault in Mexican linaloe oil. This oil is distinctly finer in odour than the Mexican product. _Clove oil_, distilled from the unripe blossoms of Eugenia caryophyllata, the chief source of which is East Africa (Zanzibar and Pemba). Specific gravity at 15 deg. C., 1.045-1.061; optical rotation, slightly laevo-rotatory up to -1 deg. 30'; phenols, estimated by absorption with 5 per cent. potash solution, 86-92 per cent.; refractive index at 20 deg. C., 1.5300-1.5360; soluble in 1 to 2 volumes of 70 per cent. alcohol. The principal constituent of the oil is eugenol, together with caryophyllene and acet-eugenol. While within certain limits the value of this oil is determined by its eugenol content, oils containing more than 93 per cent. phenols are usually less satisfactory in odour, the high proportion of phenols being obtained at the expense of the decomposition of some of the sesquiterpene. Oils with less than 88 per cent. phenols will be found somewhat weak in odour. This oil is extensively used in the cheaper toilet soaps and is an important constituent of carnation soaps. As already mentioned, however, it causes the soap to darken in colour somewhat rapidly, and must not therefore be used in any quantity, except in coloured soaps. _Concrete orris oil_, a waxy substance obtained by steam distillation of Florentine orris root. Melting point, 35-45 deg. C., usually 40-45 deg. C.; free acidity, calculated as myristic acid, 50-80 per cent.; ester, calculated as combined myristic acid, 4-10 per cent. The greater part of the product consists of the inodorous myristic acid, the chief odour-bearing constituent being irone. The high price of the oil renders its use only possible in the very best quality soaps.