12 
Indian Forest Records . 
[Vol. Ill 
determinations, which are all made on the absolutely dry sub¬ 
stance. To avoid the error which is possible owing to changes 
in the constitution of the material caused by repeated drying 
of the same sample, separate portions of it are used, viz., 
one each for (a), (b) and (c) and one for (d) and (e). 
14. As crushing settles the node difficulty we have now to deal with 
the analysis of the bamboo as a whole. The proportional weight of nodes 
to the whole is first ascertained and the analysis samples made up of in¬ 
ternode and nodal portions in accordance therewith, the internodes being 
reduced to fine shavings and the nodes to coarse filings. To give an idea 
of the extent to which the admission of the nodes affects the average 
composition of the whole, the following results on a few typical samples 
are given :— 
TABLE III. 
Analyses of internodes and nodes in seasoned bamboo. 
Per cent, 
of 
whole. 
Water 
extract. 
Fat 
and wax. 
Pectose. 
I/gnin. 
Cellu¬ 
lose. 
Ash. 
100 
B. polymorpha, Internodes 
91 
8-70 
1-04 
19-15 
15-29 
55-82 S 
3-87 
„ nodes 
9 
9-83 
1-40 
25-04 
17-60 
46-13 
4-50 
Average of the whole 
8-80 
1-07 
19-68 
15-50 
54-95 
3-92 
C. pergracile, Internodes. 
94 
7-96 
•90 
22-14 
15-10 
53-90 
2-50 
„ nodes 
6 
9-07 
1-24 
26-27 
16-72 
46-70 
4-20 
Average of the whole 
•• 
8-03 
•92 
22-39 
15-20 
53-46 
2-60 
The chief differences are that the nodes show a considerably larger 
amount of pectose, with a smaller increase in lignin, sufficient together 
to account for their greater consumption of NaOH when digested by 
themselves, and for their obstinate resistance to penetration. When 
crushed and mixed with the internodes, the resistance disappears, and 
the total non-cellulose so slightly raised that its effect on NaOH con¬ 
sumption is negligible. 
15. Before proceeding to deal with the analysis of normal seasoned 
Starch bamboo, one disturbing feature peculiar to it must 
be disposed of. In the annual reproduction of new 
culms, bamboo is unique, in as much that the whole of these reach their 
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