and pumped to the stock chest.  Stock from cooks Nos. 313 and 314 was treated in exactly the same manner, except that 11.4 per cent of bleach was used.  It was pumped to the stock chest and mixed with the furnished stock from cooks Nos. 310, 311, and 312.  A medium Jordan brush was given the stock and it acted well on the paper machine, which was speeded to 75 feet per minute.  There seems to be a tendency in the hurd stock to crush a little at the “dandy 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. 143, and it is also a good illustration of the extent to which proper tinting will enhance the general appearance of a paper.  The poor appearance of the samples of previous runs is due largely to lack of proper tinting.  Various degrees of whiteness, however, are demanded by the trade.