10 
Indian Forest Records. 
[Vol. VI 
and seven months, out of a possible six years and seven months,- while 
Jodelite has given slightly better results than Avenarius Carbolineum 
oil. There is little to choose between these Coal-tar creosote products, 
all of which have given satisfactory results, when taking into considera¬ 
tion the extremely perishable nature of the timbers used, viz., Boswellia 
serrata, the conifers, Bombax malabaricum and Odina Wodier. 
The relative value of these antiseptics can also be based on the number 
of stakes in each group still remaining in the ground. It will be seen 
that the evidence is strongly in favour of the creosote products, as only 
two stakes treated with Coal Tar and three treated with Pinus excelsaTar 
remain sound, as against nine of each treated with Avenarius Carbolineum 
and Green oil and seven of each treated with Jodelite and Solignum. 
Turning again to Table II, it will be seen that the average life of the 
untreated stakes of each group only varies between two years and eight 
months and three years and three months—a fact clearly demonstrating 
the uniformity of the conditions under which the experiments were 
carried out. 
(Hi) Third group of Laboratory Experiments. 
Experiments carried out with Cre&ojh, Anthrol, Burma oil, and 
Liquid Fuel from Borneo. 
These experiments naturally fall into two categories, i.e., those 
dealing with Cresoyle and Anthrol, both coal-tar products, which have been 
in progress five years or more ; and those with Burma oil and Liquid 
Fuel, both belonging to the petroleum series, the experiments with 
which have been three and a half years in progress. 
The treatment of these groups of specimens varied somewhat, those 
treated with Cresoyle having been immersed for 10 minutes in a cold 
solution ; while those treated with Anthrol were immersed in a hot bath 
for an hour and allowed to remain in the solution as it cooled down, 
for 16 hours ; while the Burma oil and Liquid Fuel specimens were treated 
in hot oil for 15 minutes and 45 minutes respectively. 
Diagram III.* 
Diagram III records the durability of each individual treated and 
untreated specimen. 
Here again, there is a striking contrast between the treated and 
untreated soft-woods, which is even more marked in the case of the 
Creosote oils than in that of the Petroleum oils. 
A critical analysis of the relative value of these oils is given in the 
following Table :— 
* This will be found in the poJk3t at the end of this publication. 
t 140 ] 
