CAMPHOR OF BORNEO. 469 



camphor and sodium-borneol. If carbonic anhydride 

 is now conducted into the solution, and, after satu- 

 rating with this, water is added, and the aqueous solu- 

 tion separated from the toluene, borneol is deposited 

 from the solution in a short time. This is filtered off, 

 and to the filtrate hydrochloric acid added, when cam- 

 phocarbonic acid is precipitated. Small, colorless crys- 

 tals. Difficultly soluble in water, easily soluble in 

 ether. Begins to melt at 118-119, but at this tem- 

 perature it is resolved into camphor and carbonic 

 anhydride. Monobasic acid. 



A camphor, very similar to the ordinary variety 

 just described, separates from the oil of Matricaria par- 

 thenium, when that portion of the oil, which boils 

 between 200-220, is cooled down to 5. It differs 

 from ordinary camphor only in the fact of its turning 

 the plane of polarization to the left. When oxidized 

 it also yields camphoric acid, but while ordinary cam- 

 phoric acid is dextro-rotatory, the acid obtained from 

 Matricaria-camphor rotates the plane of polarization 

 just as far to the left, and by mixing equal weights of 

 both acids, an optically inactive camphor is produced. 

 Here exists hence exactly the same relation as between 

 dextro- and Isevo-tartaric acids, and racemic acid (p. 

 184). 



2. Camphor of Borneo (Borneol, Camphol). 

 <>H 18 = C l H 17 .OH. 



Obtained in Borneo arid Sumatra from Dryobalanops 

 camphora. It occurs partially in a solid, crystalline 

 state, in cavities in the trunks of old trees, in company 

 with a volatile oil, which is contained in larger quan- 

 tity in the younger trees, and flows out of incisions 

 made in them. It is produced from camphor when 

 this is heated with alcoholic potassa, or heated succes- 

 sively with sodium and water (see Camphocarbonic 

 acid, p. 468). Very similar to ordinary camphor, but 

 more friable, having an odor like that of camphor and 

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