ETHYL ALCOHOL FROM WOOD WASTE. 
37 
In the experiments of series IV, 1.80 per cent of sulphuric acid 
was used. The experiments were then repeated with the use of 100 
and 200 per cent of water with 1.40 per cent of sulphuric acid, and 
the results were the same. These results are shown graphically in 
DUU 
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3456789 10 
YIELD OF ALCOHOL IN °/ OF DRY WEIGHT OF WOOD 
Fig. 6.— Series IV and IYa, showing variation in alcohol yields with varying concentrations of water at 
two different acid concentrations. 
figures 6 and 7. Figure 6 shows that the average alcohol yields 
v/ere very nearly constant for the different concentrations of water 
used, and figure 7 shows that this also held true for both the amounts 
of total sugars and the percentages of sugars that were fermentable. 
