135. The stock was washed one hour, but given a brush of three hours,
and this brush was harder than in run No. 135. Bleach to the extent of
19.8 per cent of the fiber was used, assisted by 1 pint of oil of
vitriol, and the resulting color was an improvement over that of run No.
135. After adding 13.5 per cent of clay and sizing with 1.1 per cent of
resin size, the furnish was given one-half hour's light brush, tinted,
and run on the machine, which was set at 70 feet per minute. This stock
acted better on the wire and gave no trouble on the machine, but it
still seemed to be impossible to reduce the wood shives by manipulation
of the Jordan refiner. The resulting sheet is an improvement over that
produced by No. 135, but is far from satisfactory.

Run No. 138 was made from hurds which, as in all subsequent tests, were
sieved on a 11-1/2-mesh wire screen until practically all the loose dirt
and sand was removed, which operation caused a loss averaging 3 per cent
of the hurds. Stock from cooks Nos. 302 and 303 was used for this run
and the increased amount of caustic soda and the increase in the time of
cooking gave a stock of better appearance than those of preceding tests.

The stock, amounting to 231 pounds dry weight, was washed and at the
same time given a light brush for one hour only, after which it was
bleached with 17 per cent of bleach without the addition of acid. Since
the preceding paper appeared somewhat weak and had a low tearing
quality, it was decided to use a furnish of 15.7 per cent bleached
sulphite and 84.3 per cent bleached hemp-hurd stock. After loading with
13.1 per cent of clay and sizing with 1.1 per cent of resin size, the
furnish was given a medium brush for one hour, tinted, and run on to the
machine at 70 feet per minute. The stock gave no trouble on the machine,
but it was impossible to judge the effect of the Jordan refiner, because
through an oversight the machine chest had not been cleaned since