Part V.] Pearson: Note on the Utilization of Bamboo. 37 
They go on to state : “ the C. per gr exile or Tinwa sample lot was 
all used up in trials at the lower pressure of 60 lbs., but we have no doubt 
it will give equally good results with B. polymorpha under similar 
treatment.” 
B. arundinacea , “ Daugi ” bamboos. —Their report on this species 
runs as follows :— 
“ This species we boiled for twelve hours with 24 per cent, of caustic 
and it came out much under-digested. This bamboo is a failure so 
far as our experiments have gone, but this does not mean that the 
species is useless for paper-pulp, but that further investigation is 
necessary, in order to find out the proper method of treatment.” 
B. arundinacea is an extremely heavy species, with thick walls and 
heavy nodes, it is very probable that Raitt’s method of crushing will 
have to be resorted to in order to treat this species, and possibly it may 
also be found necessary to cut out the nodes. 
M. bambusoides, “ Muli ” bamboos. —The report on this species runs 
as follows :— 
“ We treated this species exactly as in the case of B. polymorpha, 
but the fibre was not fit to make white paper. It gave a good looking 
pulp, but it would not bleach with a reasonable quantity of bleaching 
powder. Also small black stringy fibres appeared throughout the 
pulp, which are most objectionable, as they cannot easily be taken out 
and would spoil white paper, even if the bleaching difficulty were got 
over.” 
It is evident that Melocanna bambusoides bamboo will require 
further testing, before it can be used for paper-pulp.* The question 
of producing a better colour by bleaching, within economic limits of 
working, may possibly be overcome by treating this species by the 
sulphate process. The appearance of dark stringy fibre in the pulp may 
very likely be due to the black fibre in the nodes, or in the sheath in 
which case it will be necessary to cut out the joints or get rid of any 
adherent portions of the sheath.f 
6. Cost of manufacturing one ton of air-dried unbleached pulp. 
The whole question of manufacturing bamboo-pulp at a profit, that 
is to say, a pulp capable of being converted into high class printing 
* Note. —Further tests with this species of bamboo have been arranged for, the 
bamboos for testing being sent from Arakan. 
t Note. —It has been ascertained, since writing the above, that the sheath is the 
cause of the black stringy fibres, and these can easily be cut off before treatment. 
[ 194 ] 
