MR SCHMIDL ON THE CONSTITUTION OF OIL OF CAJEPUT. 377 
_ tine, but soluble in ether, and when exposed to atmospheric air, it rapidly oxi- 
* dises, acquiring a red colour and resinous consistence. 



Analyses. 
(a) 4:19 grains of substance gave 13-57 CO, 4-55 HO. 
(6) 315 _ i 10:19 CO, 3°42 HO. 
Carbon : : < : : . 88°33 88:28 b 
Hydrogen . ; ‘ : : : 12:06 12:06 
100-39 100°34 
Vapour Density. 
Temperature of air, . é : 5 : 16+C. 
Temperature of vapour, : E : “fy so20r C 
Excess of weight of balloon, . : : . 0599 grm. 
Capacity of balloon, : 5 : : ee ks CLO 
Residual air, : : : ‘ : ‘ 22 CC. 
198 x 0:0001224 84135 
= = ———. = (°96. 
EOI ( 176 x Foaens) Toes — ! 
The theory requires double the quantity of what is required for the formula 
C,, H,,=4'65 x2=9°30. The great difference between the experimental and 
theoretical results can only be accounted for by the high boiling point of the sub- 
stance, and its great tendency to decompose at that temperature. 
Reactions. 
Gaseous hydrochloric acid produces a dark violet fluid, which does not deposit 
any crystalline compound, even if the operation be performed at -10° C. Nitro- 
sulphuric acid does not act so violently as on the two foregoing fractions. 
IV. HEXHYDRATE OF CAJPUTENE, C,, H,,+ 6 HO. 
Two parts of dilute sulphuric acid are added to one of the crude Oil of Cajeput ; 
the mixture is then well shaken for several days, until the watery layer acquires 
a yellowish colour; thereby the presence of organic matter in the latter is indi- 
cated. After that the mixture is left to itself, when, usually from about the tenth 
day and upwards, crystalline tufts, adhering to the sides of the vessel, are found. 
These crystals are sparingly soluble in cold, but readily in boiling alcohol; 
they fuse at 120° C., and solidify again at 85°C. When submitted to dry dis- 
tillation, the oily fluid which passes over solidifies again in the colder parts 
of the receiver; but from the limited amount of substance then at my disposal, 
I could not ascertain if this product of sublimation was of the same or of altered 
composition. 
The following are the detailed results of the analyses performed with the sub- 
' Stance after previous recrystallisation out of alcohol :— 
VOL. XXII. PART Il. 5 E 

