322 ODOROGRAPHIA. 
volatile oil which becomes an easy adulterant is cedar-wood oil, as 
various oxidizing agents have very much the same action on both 
oils, and reduction of sp. gr. caused by admixture of cedar-wood 
oil is not a sufficiently reliable indication by reason of the high 
figures of some of the Indian distillates. 
Pure German distilled oil of Indian santal wood, sp. gr. 0°9797, 
is perfectly soluble in its own volume of methylated alcohol of 
sp. gr. 0°839. Cedar-wood oil forms a white cloudy mixture in 
its own volume of the same solvent ; but one volume of an equal 
mixture of santal-wood and cedar oil under the same conditions 
dissolves perfectly. (See Addenda, p. 374.) 
With alcohol of sp. gr. 0°920, the same Indian santal oil also 
dissolves in an equal volume; one c. cm. of “ Macassar” santal 
oil of sp. gr. 0°9738 requiring 1°3 c. em. of the solvent. One c.cm. 
of cedar oil requires 5 c. em. of alcohol of same strength for solu- 
tion. From these facts, observed by Mr. Holmes ™%, it appears that 
whilst oil of cedar may be recognized by its insolubility in an equal 
volume of alcohol of sp. gr. 0°920, its admixture with santal-wood 
oil to the extent of 10 per cent. cannot be easily detected. 
The admixture of “ West Indian” and ‘‘ West Australian” santa] 
oil can be detected by observing the optical rotation, and the addi- 
tion of “South Australian” santal oil would increase the sp. gr. 
(these figures are hereafter given). 
Pure Indian oil of santal contains a body called Santalal, 
C,;H,,0, boiling at 300° C., together with a smaller amount of 
Santalol, Cy;H 0, which boils at 310°, and is converted by distilla- 
tion with phosphorous pentoxide into Santalene, C,;H,.,, boiling at 
260°; Santalal, on the other hand, when subjected to similar treat- 
ment, yields a hydrocarbon C,;H,. which is probably identical with 
Cedrene (?) +. Santalyl acetate, C,;H,; .C,H;0., is prepared by 
heating santalol to 150° with glacial acetic acid; this liquid boils 
at 298° and has a fruity odour. 
The Santalum myrtifolium, Roxb., differs in one or two particu- 
lars from S. album, and Roxburgh considered the differences to be 
of sufficient importance to warrant him in giving it a specific 
name {. It has lanceolate, waved leaves about 2 inches long and 
2 inch broad, It is a native of the Circar mountains, where it is 
* Pharm. Journ. [3] xvi. p. 822. 
* Bull. Soc. Chim. xxxvii. p. 303. 
t Flor. Ind. i. p. 464, and Corom., PI. i. no, 2. 
