Part V.] Sweet: On Air Seasoning of Indian Timbers. 
31 
(]9) Dichopsis polyantha (Appendix I — 19). Cox’s Bazar Division, 
Bengal. 
Since the report of the seasoning of this timber is incomplete, it 
is impossible to draw definite conclusions. The girdling experiment 
was not carried out. The data at hand indicate that this species is 
quite liable to considerable damage by surface cracking and splitting 
and, to a limited extent, to damage by borers. 
Seasoning in the log appears to have minimized the surface 
cracking and splitting and to have given the best general results, 
although some damage by borers was incurred by this method. 
Water seasoning showed slightly poorer results than green conversion. 
(20) Dipterocarpus turbinatus (Appendix 1—20). Coorg. 
The results of the seasoning of this species wnre very good and 
justify classifying the timber among the moderately refractory 
species. Splitting was common in the wide boards but not excessive, 
and many of them seasoned with no twisting or cupping. Surface 
cracking was neghgible in both the boards and scantlings. The 
amount of damage done by insects was very slight. White ants 
worked over the surface of a few pieces, and small borers were present 
in the sapwood of the timber supposedly converted green, but which 
actually lay in the log for five months before conversion. Some of 
the timber, especially that cut from girdled trees, was mouldy and 
discoloured, but this was due entirely to the manner in which the 
pieces were piled after conversion rather than to the girdling itself. 
There was some incipient decay in the sapwood of the timber 
seasoned in the log. 
Water seasoning gave the poorest general results due to splitting 
and sui’face cracking. 
Green conversion and girdling gave the best results, with little 
difference between them, after discounting the depreciation in the 
girdled timber from mould and stain which was actually due to faulty 
piling. 
Seasoning in the log involved some damage from decay in the 
sapwood. 
It appears that this species is not especially exacting in its 
requirements regarding the seasoning. Providing ordinarily good care 
is given to the logs and converted timber, very satisfactory 
results may be expected. Prompt conversion and facilities for fairly 
rapid seasoning are recommended for the species. 
1 21) Drimycarpus racemosus (Appendix I — 21). Ck)x’s Bazar Divismn, 
Bengal. 
The report as to the seasoning of this timber is incomplete ; hence 
it is impossible to draw definite conclusions. The girdling experi- 
ment was not carried out. From data at hand, it appears that this 
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