6b 
Part I.] Puran Singh : Turpentine Oil and Indian Rosin . 
The above figures show that the present samples yielding 
practically no distillates below 165° C. are quite different from 
American turpentine oil, which should yield not less than 70 per 
cent, by volume between 155° and 160° C. They are of the same 
nature as a sample of turpentine oil from Finns longifolia from the 
Jaunsar Division, United Provinces, previously examined at the 
Imperial Institute (see Imperial Institute Report, dated 27th 
July 1909). One-third of the latter was lsevo-pinene, boiling at 
157° C. and having a rotatory power in a 100 mm. tube of - 36J°, 
and two-thirds consisted of a mixture of sylvestrene and other high 
boiling terpenes with a boiling point of 173° C. and a rotatory 
power in a 100 mm. tube of +13°. 
III. 
Extract from the Report of Professor Dunstan on Turpentine 
Oil from India, No. 40471, dated 23rd February 1912. 
(The samples being of the acetic acid-distilled oil, prepared at the Forest 
Research Institute Laboratory, Dehra Dun.) 
Description of samples. 
The samples consisted of colourless turpentine oil and were 
labelled as follows : — 
(1) “ Crude turpentine oil distilled through acetic acid from 
Finns longifolia; made by the Forest Chemist, Dehra 
Dun.” Weight J3 oz. 
(2) “ Rectified turpentine oil from Finns longifolia distilled 
through acetic acid; made by the Forest Chemist, 
Dehra Dun.” Weight 1 lb. 
In the present report the crude and refined oils are designated 
C and D respectively. 
Results of examination. 
The samples were examined with the following results, com¬ 
pared with the corresponding figures for two samples marked A and 
[ 65 ] 
V 
