Part II.] Pearson : Antiseptic Treatment of Timber. 49 
A number of powellized sleepers of different species were laid down 
at the instigation of the Forest Department on the Pyinmana line in 
Burma together with untreated sleepers of the same species. The results 
of this experiment according to the last report are as follows:— 
1 
Treated species. 
Untreated species. 
No. 
Species. 
No. 
laid 
down. 
Date of 
laying in 
open line. 
Condition 
on 1st Octo¬ 
ber 1910. 
No. 
laid 
down. 
1 
Date of 
laying in 
open line. 
Condition on 1st 
October 1910. 
1 
Dipterocarpus tu- 
berculatus. 
10 
March 1908 
Soun d. 
10 
15th April 
1907. 
One removed in 
July 1910, one fail¬ 
ing, the rest sound. 
2 
Dipterocarpus tur - 
binatus. 
10 
Do. . 
Do. 
10 
Do. . 
One removed in 1909, 
the rest sound. 
3 
Albizzia odora- 
tissima. 
10 
Dc. . 
Do. 
10 
Do. . 
One removed in 
July 1910, the rest 
sound. 
4 
Albizzia procera . 
10 
Do. . 
1 Do. 
10 
30th July 
1907. 
One doubtful. 
5 
Homulium tomento- 
sum. 
10 
Do. 
Do. 
10 
15th April 
1907. 
Eight removed in 
1908-09, one in 
1910, the last fail¬ 
ing. 
6 
Sckleichcra trijuga 
10 
Do. . 
Do. 
10 
Do. . 
Seven removed in 
July 1910 ; three 
sound. 
Tcrminalia belerica 
10 
Do. . 
Do. 
10 
Do. . 
All ten removed in 
1909. 
8 
Terminalia tomcn- 
tosa. 
10 
Do. . 
Do. 
10 
Do. . 
All in good order. 
9 
Careya arborea 
9 
September 
1907. 
Do. 
10 
1 
Do. . 
September 
1907. 
Ditto. 
10 
Pinus Khasya 
9 
Do. . 
j 
One remov¬ 
ed in 1909, 
the rest 
in order. 
10 
1 
1 
Janu ary 
1907. 
September 
1907. 
Four removed in 
1908 and six i i 
1909. 
The above sleepers were again inspected by the writer of this Note 
in February 1911 and found to be in good order. 
Another set of experiments has been in progress at the Forest 
Research Institute, Dehra Dun, since April 1909, where a considerable 
number of different species of powellized timbers have been received 
from Messrs. Killick, Nixon & Co., Agents to the Powell Company in 
Bombay, which were originally sent by Forest Officers to the Powelliz- 
ing Company for treatment. On their receipt at the Institute they 
were all laid down in the ground together with unt reated specimens of 
the same species. The greater majority of the specimens were placed 
upright in the ground, as it was thought that in this position, being half 
under ground and half exposed to climatic influences, they would be 
( 122 ) 
