oil yields 40 lbs. of pure white oil and 20 lbs. of camphor. It rapidly oxidises in the air. Used to scent soap. See Camphor (Liquid).
Oil of Car′away. Syn. Oleum carui (B. P. Ph. L. E. & D.), O. c. essentiale, L. From the fruit of Carum Carui (caraway seeds). Nearly colourless; aromatic; carminative. Sp. gr. ·940; (old) ·946 to ·950. Prod. Av. 5% (nearly). It is frequently adulterated with oil of cumin. Added to purgative medicines to prevent griping.
Oil of Car′damoms. Syn. Oleum cardamomi, O. c. essentiale, L. From the seed of Elettaria cardamomum, or true cardamom. Colourless; fragrant; carminative. Sp. gr. ·943. Prod. 5% (nearly). The capsules (‘lesser cardamoms’) yield only about 1% of oil. (M. Raybaud.)
Oil of Cascaril′la. Syn. Oleum cascarillæ, L. From the bark of Croton eleuteria (Swartz.), or cascarilla tree. Very fragrant. Prod. ·4% to ·75%.
Oil of Cas′sia. Syn. Oil of China cinnamon; Oleum cassiæ (Ph. E.), L. From cassia buds, or from cassia bark, Golden yellow; aromatic; fragrant. It is generally adulterated with rectified spirit. Nitric acid converts the pure oil into a crystalline mass. Sp. gr. 1·071 to 1·073; (old) 1·078 to 1·090 Prod. From the buds of 1% (barely); from the bark of commerce, ·75%. It is frequently sold for oil of cinnamon.
Oil of Cebadil′la. Syn. Oil of sabadilla; Oleum cebadillæ, L. A green butyraceous matter, obtained from Asagræa officinalis.
Oil of Ce′dar-wood. From the wood of a species of Cedrus. It consists of two hydrocarbons. One, a volatile liquid (cedrene), and the other a solid, crystalline compound containing oxygen. Prod. ·2% to 25%.
Oil of Ce′drat. Syn. Essence of cedra; Oleum cedri, O. citri finum, L. From the exterior yellow rind of the fruit of Citrus medica (Risso), or citrons, either by expression or distillation, as oil of bergamot. The first portion of oil that comes over is colourless; the latter portion greenish. Very fragrant. Sp. gr. ·847. Prod. 100 citrons yield nearly 1 fl. oz. of pale, and 1⁄2 fl. oz. of green oil. See Oil of Citron (below).
Oil of Cel′ery Seed. Syn. Oleum apii. L. From the fruit (seed) of Apium graveolens. Diuretic; stimulant. Prod. 3⁄4% to 1% (nearly).
Oil of Cham′omile. Syn. Oil of Roman chamomile; Oleum anthemidis (Ph. L. E. & D.), O. chamæmeli, O. c. florum, O. essentiale ex floribus c., L. From the flowers of Anthemis nobilis. In the Ph. L., English oil of chamomile (anthemidis oleum Anglicum) is ordered. Blue; turns yellow and brown by exposure and age; odour characteristic. Sp. gr., English (from the flowers), ·9083; foreign, ·9289. Prod. Fresh flowers, ·1% (barely); recently dried (finest commercial), 5%; av. of 6 dried samples, ·25% (nearly). If much water is employed, even