330 MR SCHMIDL ON THE CONSTITUTION OF OIL OF CAJEPUT. 
A product of similar composition is obtained when the Bihydrochlorate of Caj- 
putene is treated for several days at high temperature with an aqueous or ~ 
alcoholic solution of potash ; the smell of this substance, however, is so entirely 
different from that of the other monohydrochlorate (reminding of pelargonic 
ether), that some further investigation may probably lead to more striking 
chemical as well as physical differences between these two isomeric substances. 
VII. BICHLORIDE OF CAJPUTENE, C,, H,,+2Cl. 
The large rectified fraction of Oil of Cajeput is mixed with some very dilute 
nitric acid, and then exposed to a stream of gaseous hydrochloric acid, when, 
after a few minutes, violent evolution of yellow and red fumes, consisting of 
chlorine and nitrous acid, takes place. The gaseous hydrochloric acid is allowed 
to pass so long till the oily fluid in the vessel has entirely sunk to the bottom, 
having then the watery layer (reversely to the beginning of the operation) 
above itself. 
If the vessel be, after the operation, kept at a low temperature, a crystalline 
compound may be formed, which, however, I was only once fortunate enough to 
obtain, but in so small a quantity that I could not make more than one analysis 
of it, by means of which, however, I convinced myself of the presence 
of chlorine in that substance. In ordinary cases, therefore, I had to content 
myself with a limpid brown fluid, which, in consequence of the adhering nitric 
and nitrous acid, I redistilled over a strong solution of potash; and thus prepared 
I submitted it to its elementary analyses, of which the following are the detailed 
results :— 
(a) 2°87 grains of substance gave 6:05 CO, 2:09 HO. 

(6) 3°61 Ss x 7:60 CO, 2:63 HO. 
(c) 2:91 Y Bs 4:10 chloride of silver. 
(d) 484 ” Ps 3°97 ; 
Carbon, : 57:49 i 57°41 b 57:98 
Hydrogen, . 8:09 8-09 c d 7°72 > Theory. 
Chlorine, : : 34°57 34:21 34°30 
100-00 
As this substance could not be distilled by itself without decomposition unless 
in vacuo, I was not able to take its vapour density. It possesses an extremely 
fine and agreeable smell, and may be kept for any length of time without under- 
going any decomposition. When boiled with nitrate of silver, a peculiar detona- 
tion takes place, and chloride of silver is formed. 
Before leaving the compounds which are produced by the action of hydro- 

