Oil of Lov′age. Syn. Oleum levistici, L. From the leaves of fruit of Levisticum officinale, Lovage. Pale yellow, aromatic, carminative. Prod. Fresh herb, ·1% to ·15%.
Oil of Mace. Syn. Oleum macidis, O. m. essentiale, O. m. stillatitium, L. From the arillus of Myristica officinale (commercial mace). Nearly colourless; fragrant; lighter than water; closely resembles oil of nutmeg. Sp. gr. ·945. Prod. 41⁄2 to 9%.
Oil of Marc-brandy. Syn. Fusel oil of m.-b., O. of grape spirit. Obtained after the spirit (marc-brandy) has passed over during the distillation of the fermented residuum of expressed grapes. Limpid; odorous; acrid; offensive; soon turns yellow in the air; soluble in 1000 parts of water, and in all proportions in rectified spirit; 6 or 7 drops will spoil a hogshead of brandy. According to M. Balard, this oil is a mixture of potato oil and œnanthic ether.
Oil of Mar′joram. Syn. Oil of sweet m.; Oleum marjoranæ, O. oriqani m. (Ph. E.), L. From the fresh flowering herb of Origanum marjorana, or sweet or knotted marjoram. Pale yellow; odorous; tonic; stimulant. Sp. gr. ·925 (·940—Baumé). Prod. ·33 to ·35%. See Oil of Origanum.
Oil of Mea′dow-sweet. Syn. Oleum spirææ ulmariæ, L. From the flowers or flowering tops of Spiræa ulmaria (Linn.), or common meadow-sweet. This oil is a native hydride of salicyl. It is yellow, sweet-scented, and slightly soluble in water, which then strikes a deep violet colour with the persalts of iron. It boils at 385° Fahr. Sp. gr. 1·172. (See below.)
Oil of Mea′dow-sweet (Facti′′tious). This is prepared as follows:—Salicin, 1 part, is dissolved in distilled water, 10 parts, and being placed in a glass retort, bichromate of potassa (in powder), 1 part, is added, followed by oil
of vitriol, 21⁄2 parts, previously diluted with 4 times its weight of water; a gentle heat is next applied to the retort, and after the first effervescence resulting from the mutual reaction of the ingredients is over, the heat is increased, and the mixture is distilled for the oil in the usual manner. The product is absolutely identical with the natural oil of meadow-sweet. (See above.)
Oil of Mil′foil. Syn. Oleum millefolii, L. From the flowers of Achillæa millefolium (Linn.), or yarrow. Blue. Sp. gr. ·852. Prod. 14 lbs. of the dried flowers yield 3 dr. of oil.
Oils, Mixed (Essential). Syn. Olea mixta essentialia. From the oils of bergamot and lemons, of each 1 oz.; oils of lavender and pimento, of each 1⁄2 oz. Used to scent ‘sal volatile drops,’ smelling-bottles, &c.
Oil of Mus′tard (Volatile). Syn. Sulpho-cyanide of allyl; Oleum sinapis nigræ, O. s. essentiale, L. From the seeds of Sinapis nigra(Linn.), or black mustard, as oil of bitter almonds. Nearly colourless; intensely acrid, pungent, rubefacient, and vesicant; slightly soluble in water; boils at 289° Fahr. It contains sulphur. Sp. gr. 1·035 to 1·038; 1·015, at 68° Fahr. Prod. Av. ·6% (fully).