
MR SCHMIDL ON THE CONSTITUTION OF OIL OF CAJEPUT. 373 
' Anhydrous phosphoric acid deprives the oil of its two equivalents of water, 
when heated along with it. ‘ 
Chloride of zinc, under similar circumstances, does not act so energetically, 
the two equivalents of water having been found to have been only partly removed 
from the oil after the application of that reagent. 
Commercial hydrochloric acid, if left in contact for some weeks with the crude 
oil, produces a crystalline compound. Gaseous hydrochloric acid produces, 
under particular circumstances to be mentioned below, two kinds of crystalline 
compounds. 
Chlorine, when passed through the oil, raises its temperature to a considerable 
height, producing, however, no visible change in it. 
Iodine dissolves in the oil, and, under precautions which will be further de- 
scribed, different crystalline compounds may be formed. 
Bromine acts very briskly, and produces under similar circumstances, like 
iodine, crystalline compounds. 
Before leaving the Bihydrate of Cajputene, I will briefly note the results of 
the analyses performed with that secondary product, which was obtained when 
the first large fraction had been passed through red-hot soda-lime. 
Fraction 180° to 185° C. 


(a) 2:49 grains of substance gave, . : ; 7°22 CO, 4°25 HO. 
(6) 4:15 os = : : ah) P21 COs 4°51 HO. 
A. B 
Carbon, . ‘ ; é ; 79-76 80:03 
Hydrogen, . : : : 12:20 12:07 
Oxygen, : : . : 8:04 7:90 
100-00 100-00 
The increase of carbon and hydrogen shown by these analyses on the one 
hand, and the presence of a large amount of charry matter and carbonic acid in 
the employed soda-lime on the other, indicate sufficiently that by that operation 
some change or another must have taken place in the oil; but as I have not yet 
entered upon any investigation of this product, further than the above analyses, 
I refrain from giving any other opinion about it, except that the above results 
would best correspond with the empirical formula C,, H,, O,,, the percentages of 
which are— 
79°59 C. 
12°44 H. 
a Gee 

100-00 
Since I succeeded in obtaining a crystalline iodine compound, and a hydrate of 
VOL. XXII. PART II. 5 D 
