INDIAN FOREST RECORDS 
Vol. IX 
1922 
Part IV 
THE CONSTITUENTS OF SOME INDIAN 
ESSENTIAL OILS. 
PARTS I-VIL 
BY 
JOHN LIONEL SIMONSEN 
AND 
MADYAR GOPAL RAU. 
INTRODUCTION. 
In recent communications from tLese laboratories (Journ. Chem. Soc. 
Trans. 1920. 570, 1921. 119. 1644, 1922. 727.876, Journ. Soc. Chem. 
Ind. 1920. XXXIX. 296T.,1921 XL. 1261. Ind. For. Rec.VlII. 368,) the 
constituents of a number of Indian essential oils have been described. 
It now appears desirable to place on record the results of a series of in- 
vestigations on other oils. A number of these have been the subject of 
previous investigations but in the majority of cases only the constants 
of the oils were determined, no attempt having been made to isolate the 
actual constituents present. For a correct economic valuation of es- 
sential oils it is necessary that the actual constituents present should be 
determined, whilst investigations of this nature are also of considerable 
scientific interest. 
The authors wish to express their thanks to Mr. Guest for distilling 
the oleoresins oiPinus Khasya andPinus excelsa at Jallo; to Mr. Hole 
for botanical identifications and to Mr. Robertson for arranging for the 
collection of much raw material. Oiu thanks are also due to Mr. Ghose 
for assistance in the analytical work. 
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