RAPE, OIL 507 



RAPE OIL 



(Oleum Rapae, Colza Oil) 



Source, &C. The oil expressed from the seeds of Brassica campestris, 

 Linne, B. Napus, Linne, and other species of Brassica (N.O. Cruciferce). 



Description, &c. Bright yellow, rather viscous ; specific gravity 

 0-913 to 0-917 ; iodine value 98 to 103 ; congeals at 4 to 6. 

 Contains the glycerides of arachic, erucic, linolic and linolenic acids. 

 Largely used as a lubricant and illuminant. 



CHAULMOOGRA OIL 



(Gynocardia Oil, Oleum Chaulmoograe) 



Source, &c. The soft fat expressed from the seeds of Taraktogenos 

 Kurzii, King (N.O. Bixinece), Burma. It was formerly supposed 

 to be derived from the seeds of Gynocardia odorata, Robert Brown, 

 which closely resemble those of T. Kurzii. 



Description. The seeds are brownish-yellow. The oil is a soft 

 fat at ordinary temperatures, melting to a brownish oil in warm 

 weather, with a characteristic odour and acrid taste. Melting-point 

 22 to 30. Specific gravity at 45 about 0-940; saponification 

 value 198 to 213 ; iodine value 96 to 104 ; acid value 21 to 27 ; partially 

 soluble in cold alcohol, almost entirely in hot. Contains palmitic 

 acid, chaulmoogric acid (crystalline, C 18 H 32 O 2 , melting-point 68), 

 and also higher homologues of chaulmoogric acid, but the composition 

 of the fat has not yet been satisfactorily elucidated. 



Uses. Used for leprosy, psoriasis and rheumatism, both externally 

 and internally. 



COTTON-SEED OIL 



(Oleum Gossypii) 



Source, &c. The oil expressed from the seeds of various species of 

 Gossypium (N.O. Malvacece). 



The seeds are black, ovoid to rounded, 7 to 9 mm. long, 3 to 5 mm. 

 wide ; the section shows folded cotyledons with scattered, dark 

 secretion cells. 



They contain about 20 to 25 per cent, of fixed oil and about 20 per 

 cent, of proteids. Crushed and pressed they yield about 13 per cent, 

 of oil, the residual cake constituting a valuable cattle food. Cooled 

 and pressed the oil yields a quantity of solid fat (chiefly palmitin), 

 which is used in the manufacture of margarine, and a clear yellowish 



