(resinified). In alcohol of ·806 it is soluble in all proportions, but rectified spirit (·838) dissolves only 42% of this oil. Sp. gr. (recent) ·9768; (one year old) ·9853 to ·9855; (old) ·9856 to ·9900. The foreign oil is generally the heaviest.
Oil of aniseed is carminative and pectoral; and both itself and preparations have long been in favour with the masses in coughs, colds, &c. In preparing it care must be taken that the temperature of the water in the receiver and refrigerator does not fall lower than about 68° Fahr. Prod. (From the dried fruit of commerce) avoir. 2% (nearly). See Oil of Star-anise.
Oil, Ap′ple. See Amyl (Valerianate of), and Essence of Apple.
Oil of Ar′nica. Syn. Oleum arnicæ, O. a. radicum, L. From the roots of Arnica montana. Yellowish brown. Sp gr. ·940. Prod. 16 lbs. yielded 1 oz. of oil. The oil from the flowers of arnica is blue.
Oil of Asarabac′ca. Syn. Oleum asabi, O. asari liquidum, L. From the roots of Asarum Europæum. Yellow; glutinous. Two butyraceous oils pass over at the same time.
Oil of Assafœt′ida. Syn. Oleum asafœtida, L. From the gum resin. Contains sulphur. Very fetid and volatile.
Oil of Balm. Syn. Oleum melissæ, L. From the herb (Melissa officinalis). Pale yellow; fragrant. Sp. gr. ·970 to ·975. Prod. 100 lbs. of the fresh flowering herb yielding 1⁄4 oz. of oil (M. Raybaud). A mixture of oil of lemons and rosemary is commonly sold for it.
Oil of Balsam of Peru. See Cinnameine.
Oil of Ber′gamot. Syn. Bergamot, Essence of b.; Oleum bergamii, O. bergamotæ, L. By expression from the yellow portion of the rind of the fruit of Citrus Bergamia, or bergamot orange. Pale greenish yellow; highly fragrant. It is obtained purer by distillation, but its perfume is then slightly less delicate. Sp. gr. ·875 to ·885. Prod. The rind of 100 bergamot oranges yielded by distillation nearly 3 oz. of oil. (M. Raybaud.)
Oil of bergamot is frequently adulterated with rectified spirit, or with the oils of lemons, oranges, or turpentine. The presence of these substances may be detected in the manner explained under Oils (Volatile), Purity and Tests (anté), as well as by the altered density of the oil. Pure bergamot oil is much more soluble in rectified spirit than either of the others, and is further distinguished from them by its free solubility in solution of potassa, forming a clear solution.