further five days in Cu So4 are of any use as a protection 

 against the beetles. 



(2) That the bamboos which had gone through all the stages of 



the treatment and had received a proper soaking in the 

 oil tank remained unattacked and in addition were proof 

 against further attacks by the beetles. 



(3) That at least five generations of these beetles issued be° 



tween the last week in April and the end of October. It 

 is probable that many of the beetles of the last generation 

 were killed off by a cold snap experienced toward the end 

 of the month. 



(4) That the oil treatment therefore considerablv prolongs the 



period of usefulness of the bamboo, this period being, as 

 far as the experiments al present show, at least a year. 



(d) 1 am inclined to recommend that the soaking for live days 

 in water should be continued since a thick shiny gelatinous 

 substance exudes from the bamboos during this process, 

 and this exudation probably enables the bamboo to absorb 

 a larger quantity of oil than would be otherwise the case* 



(/>) That ihe soaking in the copper sulphate solution be dis- 

 continued since the experiments have shown it to have no 

 preservative effect against the beetles. 



(Y) That the bamboos be allowed to drv in a covered shed for 

 several days alter the water process. 



((f) That after the drying the bamboos be allowed to soak 48 

 hours in common Rangoon oil. 



The Superintendent ot the Telegraph workshops states that the 

 cost of the treatment as carried through by him, i.e. five days in 

 water, 5 days in Cu So4, followed by several days drying and then 

 two separate soakings (at an interval of a couple of months) of 24 

 hours each in Rangoon oil, amounts to Rs. 3.5 per 100 6-foot lengths 

 or 6.3 pies per length. This includes the labour. 



Oir.itting the Cu So4 treatment and a second soaking in the oil 

 together with the additional handling involved should effect a saving 

 in this price, although of course the longer period of soaking in oil 

 will enable the bamboos to absorb more of this than they would in 

 the shorter one of 24 hours only. 



El P. STEBBINGS, 



The Indian Forester, December, /goj. 



(A 7 otc. — It will be remarked that the bamboos experimented on 

 were only soaked in water for live days. This we do not consider 

 nearly a sufficient length of time and usually soak them for two 

 months, after which they are not attacked by beetle. — Ed.) 



