Oil, Croton. Syn. Crotonis oleum (B. P.), Oleum crotonis (Ph. E.), O. tiglii (Ph. L.), L. From the shelled seeds of Croton tiglium or Molucca grains. Imported chiefly from the East Indies. It is one of the most powerful cathartics known, and acts when either swallowed or merely placed in the mouth. Externally, it is a rubefacient and counter-irritant, often causing a crop of painful pustules, like tartar emetic.—Dose, 1 to 2 drops, on sugar; in apoplexy, &c. It is poisonous in larger doses. Sp. gr. ·947 to ·953. Prod. Unshelled seeds, 22% to 25%; shelled do., 32% to 35%.
Pure croton oil is soluble in an equal volume of alcohol of ·796, but in 2 or 3 days about 96% of the oil separates. In France the marc is exhausted with alcohol, and the oil thus obtained is added to that previously obtained from the same seeds by expression. The East Indian oil (OLEUM CROTONIS EXOTICUM) is usually of a pale yellow; that pressed in England (o. crotonis Anglicanum) is much darker.
Oil of Cu′cumber. Syn. Oleum cucurbitæ, L. From the seeds of Cucurbita pepo or squash, and the C. melopepo or pumpkin. Pale; used in lamps; and, sometimes, as a soothing application to piles. Sp. gr. ·9231. Prod. 24%.
Oil of Eggs. Syn. Oleum ovi, O. o. vitelli, O. ovorum, L. From the yolks of eggs, gently heated until they coagulate and the moisture has evaporated, and then pressed or broken up, digested in boiling rectified spirit, the tincture filtered whilst hot, and the spirit distilled off. Bland; emollient. The common plan is to fry the yolks hard; but the oil is then darker coloured and stronger. The P. Cod. orders them to be exhausted with ether, by displacement. Formerly commonly used to ‘kill’ quicksilver, and still held in great esteem in some parts of England for sore nipples and excoriations. Prod. 10 to 12 eggs yield 1 oz. See Mixed oils.
Oil of Garden Cress. Syn. Oleum lepidii sativi, L. From the seed. Drying. Sp. gr. ·9240. Prod. 54%.
Oil of Gar′den Spurge. Syn. Oleum lathyris, O. euphorbiæ l., L. From the seeds of Euphorbia lathyris or garden spurge. Cathartic.—Dose, 3 to 8 drops. Sp. gr. ·9281. Prod. 30% to 41%. Croton oil mixed with 6 times its weight of nut or rape oil is usually sold for it.
Oil of Gingel′ly. Syn. Oil of Sesamum, Benne oil, Teel o., Tel o.; Oleum sesami, L. From the seeds of Sesamum orientale (Willd.), or gingelly. Pale; bland. Used in salads, paints, &c.; also to adulterate oil of almonds. Prod. 46%.
Oil, Gourd. See Oil of Cucumber.
Oil of Ground Nuts. From the nuts of Arachis hypogæa. Glutinous.
Oil of Gurgun. See Balsam, Gurgun.