48 
Indian Forest Records. 
LVol. VI 
lifter treatment in the Chloride of Zinc solution, heated from 60° to 70°C., 
with the following results :— 
TABLE XIV. 
1 
Species. 
Average absorp¬ 
tion, per sleeper, ( 
of 5 sleepers. ( 
Temperature 
)f the Chloride 
Zinc solution) 
Period of immersion. 
lbs. 
Dipierocarpus tuber- 
culatus. 
6-6 
70°C. 
4 hours in a solution raised 
to 70°0. and allowed to 
Ditto 
! Ditto 
Ditto 
Average 
5-2 
7-0 
7*3 
6*5 lbs. pei 
Ditto 
Ditto 
Ditto 
• sleeper. 
remain for 20 hours while 
it cooled down= 24 hours. 
Dipterocarpus alatus 
3-4 
70°C. 
2 hours heating and 6 hours 
cooling = 8 hours. 
Ditto 
6-8 
Ditto 
3 hours heating and 20 hours 
cooling = 23 hours. 
Ditto 
6-6 
65°C. 
2\ hours heating and 19 
hours cooling = 21 £ 
hours. 
Ditto 
7-9 
Ditto 
3 hours heating and 19 hours 
cooling = 22 hours. 
Ditto 
15-2 
60°C. 
5 hours heating and 15f 
hours cooling =20£ hours. 
Ditto 
9-8 
60° to 70°C. . 
4 hours heating and 20 hours 
cooling = 24 hours. 
Ditto 
134 
Ditto 
Ditto 
Ditto 
6-2 
Ditto 
1 hour heating and 23 hours 
cooling = 24 hours. 
Ditto 
8-2 
Ditto 
Ditto 
Ditto 
7-5 
Ditto 
Ditto 
Ditto 
7-8 
Ditto 
Ditto 
Ditto 
6-8 
80°C. 
1 hour heating and then 
transferred to another 
tank of cold oil for 23 
hours = 24 hours. 
Average at sorption per sleeper when immersed for 24 hours= 8*1 lbs. 
As in the case of the Pine sleepers, the absorption varied with different 
batches treated though, on the whole, the amounts taken up were more 
[ 178 ] 
