16 
Indian Forest Records. 
[VOL. VI 
TABLE VI. 
Treated. 
Untreated. 
Number 
Number 
Antiseptics with 
Number of 
origin¬ 
Number 
Average 
origin¬ 
Number 
Average 
which the different 
years under 
ally 
remain¬ 
durability, 
ally 
remain¬ 
durability, - 
species of timber were 
observation. 
laid 
ing. 
in years. 
laid 
ing. 
in years. 
treated. 
down. 
down. 
Yrs. mo3. 
Yrs. mos. 
Yrs. mos. 
Cr6sol-Calcium . 
5 5 
12 
4 
2 9 
12 
4 
2 11 
Aczol 
2 5 
10 
6 
2 0 
10 
5 
1 9 
Barol 
2 3 
12* 
12 
2 3 
12 
6 
1 11 
* Of these one has been lost after 2 years and three months. 
The results obtained with Cresol-Calcium are extremely poor : only 
four out of twelve treated specimens remain: in fact, the treated specimens 
have given no better results than the untreated ones. The results of the 
field experiments with sleepers treated with Cresol-Calcium will be dealt 
with in the next chapter. The results of Aczol are equally disappointing ; 
for, though there are still six treated specimens remaining out of ten, 
this is a poor result considering that the experiment has only been in 
progress two years and five months. Barol so far shows considerable 
promise, as eleven specimens are not only present but absolutely sound 
(the twelfth is missing, but a$ the species in question is Sal the most 
durable of them all—the record may be taken as complete.) It is yet 
too early to form any definite conclusions as to the value of Barol , though 
it is safe to say that it promises well. 
4. Conclusions deduced from the Laboratory Experiments. 
As the experiments with various species of Powellized timber were 
started before and were not carried out on the same basis as the other 
experiments, it is necessary to discuss the results separately. The 
results obtained are very fairly satisfactory, especially with respect to 
the first two batches of specimens. The hard aid moderately hard 
woods treated, as compared with the untreated specimens, have fared in 
proportion better than the treated soft-woods. The reason for th s is 
probably due to the fact that the saccharine and arsenic solution is less 
liable to be washed out of the hard-wood timber, thai is the case with 
rsoft-woods. The results of the field experiments with Powellized sleepers 
will be discussed hereafter. 
The outstanding feature of the experiments with various Coal-tar 
creosote products, as opposed to salt solutions, is the evidence 
obtained in favour of the former. It is possible to deduce 
very striking figures in evidence of this statement by inspecting the 
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