Part IV.] Simonsen : Constituents of Indian Essential Oils. 
13 
PARI III. 
The Essential Oil from Cedrus Deodara, Loudon. 
The essential oil from Cedrus Deodara, Loudon has already formed 
the subject of an investigation by Roberts (Journ. Chem. Soc. Trans. 
1916. 109. 791.). The oil used for this investigation was distilled at 
Dehra Dun and forwarded by the Forest Economist to the Imperial 
Institute for examination. At the request of Mr. Howard, Silvi- 
culturist, a re-examination of this oil was undertaken owing to the 
importance of finding an economic use for the oil. 
As there was no data showing the age of the wood from which, the 
previous oil had been obtained, the oil having been distilled from factory 
shavings, a quantity of logs, 75 years old, was collected and converted 
into “ wool ” at Bareilly. On distillation in steam (pressure 30-40 lbs.) 
a yield of 2 5 per cent of oil was obtained. The constants of the oil 
compared with the oil used by Roberts are given in Table I. 
TABLE I. 
S. & G. R. 
R. 
R. 
^30° 
0-9592 
0-9549 
15° 
0-9756 
1-5203 
21° 
1-5195 
1-5225 
[«]??° . . 
+45-08° 
90® 
[a]" +52-16° 
D 
+ 34-6° 
Acid value 
1-6 
5-6 
4-5 
Saponification value 
22-1 
19-3 
4-9 
Saponification value 
after acetylation. 
42-3 
30-8 
34-4 
As the result of his investigation Roberts foimd that the oil 
contained a ketone (probably p-methyl-A^'fetrahydroacetophenone) 
2 per cent, a sesquiterpene 50-70 per cent, a phenol 0-07-0‘4 per cent 
[ 123 ] 
