21 
GROUND-WOOD PULP. 
Figure 12 shows the effect of increasing pressure on the yield per 
100 cubic feet of solid rossed wood. ‘There is a material increase in 
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ANG SNOG—NOL Yad Y3MOdISYOH 
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pres- 
increased from 20 pounds per square inch on a 
the amount of pulp produced from this quantity of wood if the 
sure of grinding is 
14-inch cylinder to 100 pounds. 
