58 
i iminary examination, 
“From observations noted during this preliminary ae om 
the following scheme was adopted for the production o | 
8 
a larger scale. 
Process, 
“The available grass in its natural condition Soon nt VerGee 
(141 02.) was in a clean state, and required little tre a “% mi 
cutting into small pieces ready for boiling. It is — 2 icwae 
on a large scale to pass the material through some 7 waa ee 
thonsaghly sated gecventtions matter. The gras liable. It 
thoroughly wetted and soaked until it became soft an P th qt 
was placed in a boiler of the spherical type, oe ¥ ota 
and digested with caustic soda corresponding to 15 per cen ~ 
. being maintained, ; : 
* Owing nd the quantity of material at our disposal peng ie 
what limited, it was only possible to conduct one rg a 
consequently a good Soe the use of caustic and degre 
€ pulp obtained after washing was of good uniform quae 
and colour. The yield agreed very closely and was only s pe 
higher than the preliminary chemical analysis shewed, w 
indicates complete reaction in the digester, gia 
“ The pulp was carefully beaten for about an hour and at the sa a 
time bleached, chloride of lime being used saat the purpose: 10 par 
stuff was taken from the beater and well washed = 
subsequently a small quantity of loading was gradually added _ 
the whole again beaten for half-an-hour, At. this stage of t . 
Operation the rosin size was introduced and the decomposition 0 
the soda resinate completed with the caleulated quantity of alum. 
si corresponded to 4 per cent. on the yd 
pulp present, the total time occupied in preparation of the pulp for 
running on the machine being two hours, 
PREPARAT 1ON OF Papper, 
“No great difficulty was experienced in running the pulp: it 
retained, however, a considerable quantity of water after passing 
; 4nd in consequence it was found necessary to 
hard. Ona large machine this precaution 
“ssary, 48 more suction-hoxes are available and 
complete control js assured 
ity 
© Paper was passed over nine ¢ 
8 Ibs. to the square inch, then thro 
imilar ma 
ylinders at a pressure of about 
ugh one calender and finally 
