93 
tained by some chemists arises to a great extent from the fact hat 
their experiments have probably bee,, conducted on <™ er -b“ led P“ £ 
So far as megass is concerned, the information gained from the ^ esult ^ 
of the experiments described in this publication clearly tends to 
confirm the idea that high pressure treatment in the boilers breaks 
down the lesser cellulosis with the formation of substances which 
are specially obstinate of removal by ordinary methods of bleaching. 
Under these circumstances special attention h f a ® bee " tlev ^ d 
the question of finding out the best means of bleach. ng the fibre In 
the normal operation of bleaching with chlorine obtained from 
bleaching powder or hypochlorite of soda, the consumption of bleach 
has regularly, as for as this work is concerned, been found too great 
for consideration on a commercial scale— consequently many experi- 
ments have been carried out on the various modifications of existing 
methods usually employed, both with the pulp in question and other 
fibres of this class, with the result that an effective means has been 
successfully evolved by which the most resistant pulp may be -readily 
bleached. [This is evidenced by a sample of paper submitted by the 
authors for our inspection.] Although the chemical reaction in this 
mode of procedure is somewhat complex, the series of operations in 
practice may be simply and conveniently carried out at a very much 
smaller cost with the ultimate saving of a relatively large amount of 
bleaching materials. The results of the quantitative tests also 
indicate, as has been previously mentioned, that the product derived 
from a low pressure boil must be taken for a successful application 
of this principle. 
Mr. Bert de Lamarre in his mill seemingly makes no attempt to 
bleach the pulp, which as far as can be gathered from information to 
hand, is conveyed direct from the boilers to the receiving tank in a 
state ready to run off on the machine. Yet it would seem to be well 
worth the introduction of a completely equipped bleaching plant of a 
moderate capacity with the additional advantage of securing a more 
profitable and far-reaching utilisation of megass for papermaking 
purposes. 
In view of the fact of the interesting and attractive description 
given in the Trinidad Mirror of Mr. Bert de La mar re’s paper mil!, it 
is not proposed to enter into any detailed account of the actual 
making of the papers except perhaps as a pardonable digression to 
mention that these specimen samples have been run off a “ Marshal! 
Miniature Machine,” the smallest working model in existence. 
Some considerable attention has been devoted to testing the 
effects produced on papers obtained by the admixture of other kinds 
of furnish with this material, which might be applicable for other 
purposes, such as printing or writing papers, where the megass alone 
is unsuitable. Some of the most useful examples, each accompained 
by anjaccount of their composition and properties, together with the 
