30 Indian Forest Records. [Vol. IV. 
annas 2 a gallon less than the current rates of imported turpentine 
in Calcutta. 
The Reporter on Economic Products to the Government of India, 
Calcutta, in his letter No. 129T, dated 13th September 1910, to the 
Assistant Conservator of Forests, Naini Tal Division, reports on this 
sample as follows : — 
“ The oil is clear and almost colourless, with a characteristic 
odour. The specific gravity at 15° C. is 0'86T, and the 
initial boiling point is 163° C. The greater part of the 
oil distils below 179° C. There is only 0'59 per cent, of 
solid matter left on evaporation, and the acidity is 
equal to 0035 per cent, of acetic acid. This is a very 
good sample of turpentine oil, the best I have examined 
from Naini Tal.” 
This temperature of 179° C. is at variance with those many times 
determined both at Bhowali and at Dehra. The difference is more 
than what can be attributed to the form of distillation flask, varia¬ 
tions of thermometers, barometric pressure, the rate of distilla¬ 
tion, etc. The spirit distilled crude oil A was sent by the writer to 
Dr. J. W. Leather, Imperial Agricultural Chemist, Pusa, to see 
whether the results of distillation at Pusa differed in any way from 
those obtained at Dehra Dun. Together with A, two other samples 
marked B and C (B being A 1 or redistilled A mentioned in Appendix 
B and C being A 1 + B 1 + C 1 + D 1 mentioned in Appendix B) were also 
sent. These three samples were received from Bhowali three months 
after distillation; it is, however, doubtful whether they were the best 
samples obtainable. This might have been due to over-exposure to 
air, incidental mixture of rosin, confusion of inferior samples dis¬ 
tilled experimentally with spirits, with the superior samples in the 
factory stores, because on fractional distillation A gave only about 
80—85 per cent, distilling below 167° C. and B gave only 95 per cent, 
distilling below 167° C., and C 90 per cent. 
Topy of Dr. LeatWs letter No. 457/1 2-2 of 1910, dated 23rd November 1910. 
“ With reference to the three samples of turpentine, A, B and C, 
which you sent with your letter No. 687/99, dated 20th September 
[ 30 ] 
