362 DINODERUS MINUTUS. 
(d) That, after drying, the bamboos be soaked for 48 hours 
in common Rangoon oil. 
Cost. 
The Superintendent of the Telegraph Workshops stated that 
the cost of the treatment as carried through by him, ze., five 
days in water, five days in CuSo, 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 R3-5 per 
100 6-foot lengths, or 6°3 pies per length. This included the 
labour. 
Omitting the CuSo, 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 
substance than they would in the shorter one of 24 hours only. 
Concluding Remarks. 
In the note previously alluded to I was able to show that, 
as a result of the oil treatment, the bamboos which had been 
converted into field telegraph posts remained unattacked up to the 
third week in November (1903), z.e. up to the cold weather, and 
that during this latter period the beetles hibernate for a couple 
of months at least. Bamboos are so largely used in India that 
the prolongation of their usefulness by even a year only would 
effect a considerable monetary saving. On my return from 
furlough I wrote, in October 1904, asking the Superintendent of 
the Telegraph Workshops how the bamboos had fared during the 
year. He replied that there was no evidence of their having been 
attacked. Now it is practically a certainty that, had the 
bamboos remained untreated in 1903, those which escaped serious 
attack during that year would have been reduced to powder by 
the end of 1904. Subsequently, at the end of March 1905, I was 
able to personally visit the workshops. I found that the 
bamboos treated in 1903 were still unattacked, and that another 
30,000 were being put through the treatment and converted into 
telegraph posts. The treatment is now carried out on the 
recommendations made, 2.¢., a first soaking in water and a subse- 
