dy roll," and
although the marks are not removed by the calender stack which was
employed in those tests it was found that one "nip" on the
supercalenders renders them practically imperceptible and it is believed
that the proper size and weight of calender stack would entirely remove
these marks. All of the papers produced up to this point are somewhat
lacking in the bulk desired in a book paper; therefore, in the two
following runs soda-poplar stock was included in the furnishes.

In run No. 143 stock from cooks Nos. 315 and 316 was given a medium
brush and washing for one hour and was medium brushed for one hour more,
bleached with 11.3 per cent of bleach assisted with one-half pint of oil
of vitriol, made into a furnish of 16.5 per cent of sulphite, 22.3 per
cent of soda poplar, and 61.2 per cent of hurd stock, loaded with 22 per
cent of clay, sized with 1.38 per cent of resin size, given a hard brush
for one hour, tinted very strongly, and pumped to the stock chest. This
stock was beaten to a greater extent than in previous runs. The stock
was run on the paper machine at a speed of 75 feet per minute, using a
medium Jordan brush, and no trouble whatsoever was experienced. Not over
2 pounds of "broke" was produced during the whole run, and that was in
the "threading" of the machine. The color of the sheet is entirely
satisfactory for many uses. The wood shives apparently were reduced to a
satisfactory degree. Experienced paper makers commented very favorably
on the running of this furnish and the quality of the paper produced.

Run No. 144 was intended as a duplicate of run No. 143. Stock from cooks
Nos. 317 and 318 was given a medium brush and washing for one hour and a
further medium brush of one hour, bleached with 11.4 per cent of bleach,
and made into a furnish composed of 15.5 per cent of sulphite, 23.5 per
cent of soda poplar, and 61 per cent of hurd stock, loaded with 21.4 per
cent of clay, sized with 1.17 per cent of resin size, hard brushed for
one hour, tinted by the expert colorer of the company, and pumped to the
stock chest. Stock from cooks Nos. 319 and 320 was treated in exactly
the same manner except that the stock was bleached with 12.1 per cent of
bleach and pumped to the stock chest to mix with the former furnish. The
stock acted very well on the machine, which was speeded to 75 feet per
minute, with the Jordan refiner set at a medium brush. The sheet is as
good, if not better, than that of run No