The Indian Forest Records A Further Note on the Antiseptic Treatment of Timber Recording Results Obtained from Past Experiments

For sylvicultural as well as for economic reasons it is obvious that the removal of mature trees of the auxiliary species should keep pace with the removal of those of greater value and the only profitable way of doing this is to create a demand for the timbers one of which it is fairly certain will be in the form of treated sleepers. [...] Another way of illustrating the results obtained is to calculate the average life of the treated and untreated specimens basing the calculation on the time they have been in the ground up to the last date of inspection. [...] The only explanation that can be offered is that the method of treatment was not so thorough in the case of the latter batch of specimens as it was when dealing with the two former the impregnation having in every instance been carried out for the Forest Department by the Powell Process Company. [...] To compare the values of the different antiseptics the following table has been prepared which gives the number of specimens of each series still remaining sound or sufficiently serviceable not to necessitate their removal and the average life up to date of the twelve treated and twelve untreated specimens of each group :— * This will be found in the pocket at tho' card of thk publication. [...] The reason for subjecting the timber to different periods of immersion was due to the recommendations of the patentees of the various subtances and to the period of immersion having to be regulated in direct proportion to the cost of the solution.