Part I.] 
Pur,an Singh : Turpentine Oil and Indian Rosin . 
59 
being only temporarily there be could give no information what¬ 
ever as to the quality of the turpentine oil required by the Pail- 
ways. I had to wait two or three days till the return of the perman¬ 
ent Foreman from leave, to whom the Workshop Manager sent me. 
I requested him tp test ^he four qualities of the oil I had with me 
in my presence, comparing each one of them with the American 
oil that he had. He had two qualities of the American oil, one he 
called “ very superior” and the other “common.” He then 
tested the six samples of the oil with the following results : —■ 
Common American oil (used 
for rough work). 
Very superior American oil . 
A • • • • • 
A 1 . 
A+B+C+D . 
Ai+Bi + CH-F 1 . 
Sticky surface. 
Very slightly sticky, almost dry surface. 
Slightly sticky surface. 
Perfectly dry surface. 
Sticky surface. 
Perfectly dry surface. 
A 1 was slightly better than A 1 + B 1 + C 1 + D 1 , A was better than 
A + B + C + D and A 1 + B 1 + C i + D 1 was equal to the “very superior” 
American and A 1 was slightly better than “ very superior ” Ameri¬ 
can oil, according to the Foreman's test. Both A and A + B + C + D 
were better than the “ common ” American oil. This was our 
unanimous conclusion. These results happily were exactly in 
accord with my own opinion about the samples based on the results 
of fractional distillation. The Foreman agreed with me that the 
test applied by him was rough and that it was possible that it 
might be somewhat misleading. For example, the superior 
American oil gave a very slightly stickjr surface, not because it was 
inferior oil, but because it was rather old. The same oil if kept 
still longer would by his test be liable to rejection. I could not 
find out from the Foreman the cause of the rejection of the spirit 
distilled sample that was previously sent to the shops from Bhowali 
for trial, as the test of that sample was done when he was on leave. 
The following is the copy of the Foreman’s report to the Workshop 
Manager who let me have a copy : —- 
“ I have tested four samples of turpentine brought down by 
the Forest Chemist marked (1) A, (2) A 1 , (3) A + B + 
C + D and (4) A 1 + B 1 + C 1 + D 1 . I find (2) and (4) 
[ 59 ] 
