Part II.] Pearson: Antiseptic Treatment of Timber. 89 
Doppel flour consists, simply in the varying proportions of Sodium-fluoride 
to Dinitro-phenolanilin, thus Einfachflour consists of 1 part of sodium- 
fluoride and 0*25 parts of Dinitro-phenolanilin, and Doppel-flour consists 
of 2 parts of sodium-fluoride to 0*25 parts of Dinitro-phenolanilin. 
Absorption of the Solution by Indian Timbers. 
Experiments have been recently carried out in order to ascertain the 
amount of the solution taken up by various Indian timbers. The specimens 
^ were treated with Bellit Doppel-flour, by immersion in a solution of 1 in 
44, heated to nearly boiling point and the timber allowed to remain in 
the fluid while it cooled down for 48 hours. The amount of absorption 
by the various species was as follows :— 
Register 
No. 
C 
Species. ( 
Superfi¬ 
cial area 
>f pieces 
treated. 
Volume 
<>f piece 
treated. 
l 
Weight I 
of speci¬ 
men 1 
before 
treatment. 
Weight 
of speci¬ 
men after 
treatment. 
Weight of j 
solution 
absorbed. 
1 
Absorption 
per 
sq. ft. 
Absorp¬ 
tion per 
cub. ft. 
sq. ft. 
C. ft. 
lbs. 
02« 
lbs. 
oz. 
lbs. 
oz. 
OZ. 
OZ. 
1 
Boswellia ser- 
106 
0-04 
1 
7 
2 
0 
0 
9 
8*49 
225 
rata. 
3 
Pinus longi - 
folia. 
Pinus excelsa 
T06 
0*04 
1 
8 
2 
8 
1 
0 
1509 
5*79 
400 
148 
5 
069 
0027 
0 
14 
1 
2 
0 
4 
7 
Picea Morinda 
1-06 
004 
1 
3 
1 
11 
0 
8 
755 
200 
9 
Abies Pindrow 
1*06 
0-04 
1 
1 
1 
15 
0 
14 
1321 
350 
11 
Pterocarpus 
T06 
0-04 
2 
4 
2 
6 
0 
2 
1-89 
50 
13 
macrocarpus. 
Bomhax mala - 
ro6 
0*04 
1 
0 
1 
12 
0 
12 
11*32 
300 
baricum. 
1 
7*55 
15 
Bauhinia re - 
1-06 
0*04 
2 
5 
i 2 
13 
0 
8 
200 
tusa. 
2*5 
2*36 
62*5 
17 
IHpterocarpus 
T06 
0*04 
2 
4 
2 
6-5 
0 
tuberculatus. 
6*13 
162*5 
19 
Anogeissus latv 
• 1-06 
004 
2 
6 
2 
12*5 
0 
6*5 
21 
folia. 
Odina Wodier 
1*06 
0*04 
1 
9 
2 
1 
0 
8 
7*55 
200 
23 
Shorea robusta 
1-06 
0*04 
2 
4 
i 2 
6-5 
0 
25 
2*36 
6*2*5 
The excessive absorption of Bellit by the various specimens very 
much resembles what took place when similar species were treated with an 
Atlas solution for which the water in both solutions is largely responsible, 
as also the prolonged period of immersion. The timber on drying 
( 162 ) 
