HEMP HUEDS AS PAPER-MAKING MATERIAL. 19 
sible to know in advance how the properly treated material should 
appear. A washing of one hour was given while the roll was lowered 
from a light to a medium brush, after which the stock was bleached 
with 17.1 per cent of bleach without the aid of acid. Since sulphite 
stock improved the previous paper, this bleached stock was used 
in a furnish of 16.6 per cent sulphite and 83.4 per cent hurds, loaded 
with 16.7 per cent clay, sized with 1.4 per cent resin size, given a 
medium brush of two hours, tinted, and run on to the machine at 
70 feet per minute. The Jordan refiner seemed to have little effect 
in reducing shives and was therefore left " just off." No trouble was 
experienced with the stock on the machine, and the sheet is an 
improvement over previous samples. 
Run No. 140 was made from cooks Nos. 306 and 307, in which 
more caustic soda was employed than in any previous cooks and at a 
higher concentration, the fiber yields of which averaged 37.3 per cent 
of the unsieved hurds. Not much improvement was apparent in 
the cooked stock, in spite of the increased severity of cooking. The 
stock was washed and given a medium brush for one hour, bleached 
with 11.9 per cent of bleach, assisted with one-half pint of oil of 
vitriol, and made into a furnish of 14.9 per cent sulphite and 85.1 
per cent of the hurd stock. After loading with 14.7 per cent of clay 
and sizing with 1.28 per cent of resin size, the furnish was given two 
hours' medium brush, tinted, and run on to the paper machine at 
70 feet per minute. Again the Jordan refiner did not seem to reduce 
the wood shives sufficiently, and it was left "just off." No trouble 
which could be attributed to the stock was experienced on the paper 
machine. The color of the resulting paper is due to the use of too 
little blue in tinting and probably in some measure to the use of too 
low a percentage of bleach. 
Run No. 141 was made from the stock of cooks Nos. 308 and 309 
in practically the same manner as run No. 140. The stock was 
washed and brushed one hour, bleached (the record of the amount 
of bleach was lost), made into a furnish of 14.7 per cent of sulphite 
and 85.3 per cent of hurd stock, loaded with 14.9 per cent of clay, 
sized with 1.26 per cent of resin size, given one hour at a medium 
brush, tinted, and run on to the machine. The Jordan refiner was 
able to reduce the wood shives to a somewhat greater degree than in 
previous runs and was held at a medium brush. The stock acted 
well on the machine and produced a sheet of better quality than any 
preceding, with the exception of the color, which was due to using too 
small a quantity of blue. 
Among the cooks made for run No. 142 are Nos. 312 and 313, in 
which the concentration of the caustic soda was raised to 113 and 
116 grams per liter and the percentage employed was also increased. 
In spite of these increases the stock from these two cooks did not 
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