36 
BULLETIN 983, U. S. DEPARTMENT OF AGEICLLTLEE. 
the steam consumption in cooking is greatly decreased. Second, 
there is difficulty in obtaining a juice sufficiently concentrated to 
ferment and distill economically, because, if an excess of liquor is 
present in the digester, a large portion of the sugar is dissolved 
therein. Third, there is difficulty in handling a dripping, digested 
sawdust from which the acid liquor must be separated. The follow- 
ing table shows the results obtained by decreasing the ratio of 4 
parts of water to 1 of dry wood down to equal parts of each. 
120 
100 
80 
60 
40 
20 
\ 
I 
2 
3 
u / 
'o 
A 
b 
D 
V 
N 
\ 
V 
\ 
\ 
\ 
-, 
■\ 
1. 
♦J / 
) 
ACII 
K 
f 
/ 
\ 
i 
t 
1 
J 
/ 
\ 
y 
L 
<SL 
-' 
> 
J 
i 
\ 
i 
i 
i 
3 
* 
11 
Fig, 
YIELD OF ALCOHOL IN °/6 OF DRY WEIGHT OF WOOD 
5.— Series III and IQa, showing variation in alcohol with varying cooking periods at two different 
acid concentrations. Cooking pressure, 7.5 atmospheres. 
Series IV. 
Water to wool ratio, variable; 1.80 to 1.83 per cent of H 2 S0 4 ; 7.5 atmospheres; minute. 
Cook No. 
Per cent 
H 2 0. 
Per cent 
of total 
sugars. 
Alcohol yields. 
Per cent 
of total 
sugars f er- p t f I Gallons 
mentable. £rv wood absolute 
drj ^ooa. , perton 
26 
400 
300 
250 
125 
100 
22. 24 
23. 16 
23.75 
21.96 
21.09 
56.19 
54.87 
55. 31 
59.29 
60.68 
6.154 
6.096 
6.64S 
6.805 
6.440 
18.61 
21 
22 
34 
30 
18.44 
20.11 
20. 58 
19.48 
Series IVa. 
1.40 per cent of H 2 S0 4 ; 7.5 atmospheres: minute. 
Per cent 
H 2 0. 
Per cent 
of total 
sugars. 
Per cent 
of total 
sugars fer- 
mentable. 
Alcohol yields. 
Cook No. 
Per cent of 
dry wood. 
Gallons 
absolute 
per ton. 
43 ..'." . ... 
200 
100 
21.84 
23.00 
57.94 
57.16 
6.369 
6.665 
19.62 
44 
20.16 
