378 MR SCHMIDL ON THE CONSTITUTION OF OIL OF CAJEPUT. 
(a) 2°65 grains of substance gave 6:17 CO, 2°86 HO. 
(b) 2°61 3 ‘ 6:04 CO, 2°61 HO. 
(c) 2:98 if bs 6-90 CO, 3-21 HO. 
Carbon, 63°39 63°11 63°11 63:15 
Hydrogen, 11:99 pa 11:96 >b 11-92 }e 11:57 > Theory. 
Oxygen, 24-62 24-93 24:97 25:28 




100-00 100°00 100-00 100-00 
Crystals of the same composition I found deposited in a secondary fraction of 
the crude oil, which on distillation passed over at 210°-230° C., and was left for 
a very long time moist and exposed to the action of atmospheric air. When the 
crude oil is mixed with dilute nitric acid and alcohol in the same proportions as 
are used when a similar compound is contended for in oil of turpentine, no crys- 
tals are found before at least seven or eight months; after the lapse of this time, 
however, such appear and are seen suspended in the oil, which meanwhile changes 
into a heavy black fluid. The quantity which I got by this method was so small, 
that I was not able to carry out any operations with it in order to satisfy myself — 
if its composition and qualities really were the same with, or different from, the 
above-mentioned Hexhydrate of Cajputene; but as lam again preparing the same — 
substance just now, I hope to give some account of it in a second paper. 
There also I intend to describe other crystalline compounds which I just recently 
obtained, by the action of dilute nitric acid upon the total crude oil, upon the 
rectified fraction, boiling at 175° C., upon the second fraction, boiling from 178° _ 
200° C., and upon the last green fraction, boiling from 200°-255° C. By the 
comparison of these crystalline substances I may perhaps become enabled to state 
something more satisfactory about the nature of those secondary fractions of the ~ 
crude oil. 
V. HyDROCHLORO CoMPOUNDS OF CAJPUTENE.—Bihydrochlorate of Cajputene, C,, H,, + 2 HCl. 
If gaseous hydrochloric acid be passed through the rectified oil, which is main- 
tained at low temperature, a violet fluid is produced, which, after 10-15 
minutes, suddenly solidifies into a crystalline mass, so that the orifice of the 
delivery-tube becomes obstructed, thereby preventing the further application of 
the gaseous acid. This crystalline compound, however, I was unable to analyse, 
since no sooner was it removed from the vessel where prepared than it deliquesced, 
even when pressed between bloating paper, which by means of artificial cold had 
been maintained at ’—25° C.; the fluid, also, resulting from that deliquescend 
substance, gave off constantly fumes of hydrochloric acid, and on distillation it 
decomposed entirely, showing no constant boiling point. If, however, immediately 
after the application of gaseous hydrochloric acid, that crystalline mass be thrown 

