MR SCHMIDL ON THE CONSTITUTION OF OIL OF CAJEPUT. 375 
The formula, C,, H,, O, requires— 
20 volumes of carbon = 20x0°831 = 16°620 
bi by hydrogen = 34x 0:0693 = 2°356 
1 = oxygen, |=» 11-106, =, 1-108 

20-090 
20:09 : 4 = 5:02. 
IlI.—CasPutene, IsocaAJPUTENE, PARACAJPUTENE—C,,, H,,. 
The rectified oil is allowed to cohobate over anhydrous phosphoric acid for about 
half an hour; on entire distilling, an oil passes over, which by repeated rectifica- 
tion separates into three principal fractions of distinct and steady boiling points. 
Cajputene is one and the first of these fractions ; it passes over at 160° to 165° C. 
It is perfectly colourless, and possesses a very pleasant smell, resembling that of 
hyacinths ; it is insoluble in alcohol, soluble in ether and oil of turpentine ; its 
specific gravity at 15° C. = 0°850. 
The following are the details of its analysis :— 
(a) 3-20 grains of substance gave 10°36 CO, 3°43 HO. 



(b) 3-90 , 5 12:63 CO, 410 HO, 
Carbon, : A : 88:29 88:34 88:24 
Hydrogen, «©. . 11°91 } ‘ 7a} 11-76 \ Theory 
a 100-20 100:12 100:00 
Vapour Density. 
Temperature of air, : : - ; , 16° C. 
Temperature of vapour, . : ; : » £2045C, 
Excess of balloon, : : : : . 0-399 grm. 
Capacity of balloon, o ; : : we hoo, OC; 
Residual air, : . : yn OF 
D=4'717. 
The formula requires -465. 
Reactions. 
If Cajputene is exposed to a current of gaseous hydrochloric acid, a beautiful 
violet fluid is produced ; but no crystalline compound is deposited, even if the oil 
be maintained during the operation at — 10° C, and preserved afterwards for any 
length of time. A mixture of commercial nitric and sulphuric acid acts very vio- 
logous composition will probably increase the number of similar instances. Further remarks as to 
its reactions, physical qualities, secondary products, and its relation to the Bihydrate of Cajputene, 
compared with which it might prove to be an analogous ether, I will endeavour to give in a subse- 
quent paper. 
