put into a 350-pound washing engine, washed one hour, and given a total
light brush of 2-1/4 hours. The washing removed a great amount of dirt,
but the engine did not reduce the hurd stock as much as was desired.
After heating the stock in the beater to 40° C., it was bleached with
bleaching-powder solution, 94 gallons at 0.418 pound bleach per gallon,
equivalent to 19.7 per cent of the fiber. This percentage of bleach is
regarded as too high for stock intended for book-paper manufacture, and
subsequent cooks therefore were given harder treatment in order to
reduce this figure. After draining and washing free from bleach
residues, the stock was furnished in the beater with 13 per cent of
clay, 1 per cent of resin size, and 2.5 per cent of alum, was tinted
blue, given one hour's light brush, and pumped to the stock chest. When
running it on the paper machine, the Jordan refiner seemed to have
little effect in reducing shives of undertreated wood, which indicated
further the necessity of harder cooking. The furnish acted well on the
paper machine at 70 feet per minute, but appeared somewhat too "free" on
the wire. The paper produced from this test is of very low quality, due
to the improper preparation of the stock, lack of sufficient bleach, the
use of too small an amount of blue tinting, and the presence of an
excessive amount of dirt, sand, and shives. The excessive amount of dirt
and sand suggested the sieving of the hurds before cooking, and this was
performed in all subsequent cooks.

The finish of the sheet is very poor, due to the fact that the calender
stack was composed of very light rolls which did not have a satisfactory
surface, yet the stack is known to be able to produce better finishes if
the proper stock is employed.

Run No. 136 was made on the 300-pound portion of stock from cooks Nos.
293, 294, 295, and 296, and in essentially the same manner as run No.