CONTROL OF DECAY IN PULP AND PULP WOOD 
75 
cal properties of some of the ground-wood pulps the physical proper- 
ties of which have just been discussed. (See Tables 14, 15, and 16.) 
The changes that accompany the action of molds and of wood-destroy- 
ing fungi appear to be different, in degree, at least, if not in kind. 
EFFECT OF MOLDS 
In Table 17 are presented the results of the chemical analyses of 
ground-wood pulps inoculated with 26 molds in pure culture and 
subjected to storage for periods of 6, 9, and 12 months. The loss 
in weight is also shown. The data in all cases are calculated on the 
basis of the original dry weights of the samples taken. 
Table 17. — Chemical analyses of ground-wood pulp deteriorated by pure cultures 
of molds 
Sample No. 
Incu- 
bation 
period 
Organism or culture No. 
Orig- 
inal 
loss 
Cold 
water 
soluble 
Hot 
water 
soluble 
Sodi- 
um 
hy- 
drox- 
ide 
soluble 
Lignin 
Cellu- 
lose 
Sound pulp 
Months 
Per 
cent 
0.0 
f -6 
1.2 
1.0 
f 1.1 
I 1.7 
0.7 
1.6 
1.5 
1 - 4 
1.9 
[ 1.6 
/ .3 
\ 1.4 
1 1-2 
{ 1.8 
I 1.9 
f 1.5 
{ 1.9 
I 1.3 
/ 1-1 
\ 1.0 
f 1.1 
\ 1.6 
/ 1.0 
\ 1.6 
/ 1-7 
I 1.4 
/ - 6 
\ 1.4 
/ 1.0 
\ 1.4 
/ - 4 
\ 1.8 
/ 1-2 
\ 1-4 
.9 
{ :l 
.8 
.3 
.9 
.1 
.4 
.9 
1.2 
1.6 
Per 
cent 
0.0 
.2 
.8 
1.8 
.0 
1.0 
1.8 
1.0 
.9 
1.1 
1.4 
1.1 
.6 
.1 
.8 
.0 
.0 
.8 
1.5 
1.5 
1.2 
2.0 
.9 
.5 
.7 
.7 
.8 
.8 
.2 
1.3 
.0 
.8 
1.5 
1.5 
1.5 
3.0 
.2 
.5 
.5 
.7 
.8 
.6 
1.1 
1.6 
1.5 
1.4 
.9 
Per 
cent 
1.0 
1.5 
2.1 
4.4 
1.2 
3.4 
2.8 
1.9 
3.4 
2.5 
2.7 
4.4 
1.3 
3.2 
1.8 
1.4 
3.0 
.0 
2.1 
3.1 
.3 
3.2 
1.8 
1.8 
1.7 
4.1 
1.2 
2.8 
2.2 
3.3 
.3 
2.9 
2.7 
3.3 
1.1 
3.8 
2.0 
1.4 
2.1 
1.8 
1.8 
1.6 
1.8 
2.1 
2.7 
1.1 
.0 
Per 
cent 
10.1 
11.7 
12.9 
14.4 
14.5 
14.4 
14.8 
13.7 
15.5 
14.3 
14.3 
13.0 
14.2 
13.0 
12.7 
12.4 
12.5 
10.9 
13.0 
13.9 
10.6 
14.6 
11.4 
13.2 
15.8 
14.9 
12.4 
12.0 
14.5 
14.3 
12.7 
13.5 
13.3 
16.5 
11. 1 
12.7 
12.9 
13.5 
15.5 
15.1 
13.3 
13.6 
13.3 
14.0 
13.5 
11.4 
10.4 
Per 
cent 
29.7 
28.1 
28.2 
29.0 
28.5 
29.0 
29.0 
28.5 
29.1 
29.1 
28.5 
29.1 
29.2 
29.3 
28.5 
27.8 
29.5 
29.0 
29.1 
30.1 
29.0 
30.1 
29.0 
29.1 
28.3 
29.0 
28.1 
28.8 
29.1 
29.3 
28.4 
29.7 
28.7 
28.5 
28.7 
29.0 
28.1 
28.0 
29.1 
29.2 
28.9 
28.8 
28.9 
28.8 
28.4 
29.0 
29.4 
Per 
cent 
60.0 
9 
6 
9 
12 
6 
12 
6 
9 
12 
6 
9 
12 
6 
12 
6 
9 
12 
6 
10 
12 
6 
12 
6 
9 
6 
9 
6 
9 
6 
9 
6 
9 
6 
9 
6 
10 
6 
6 
6 
6 
6 
6 
6 
6 
6 
6 
6 
5-3818-1 
7 
58.4 
8 
58.0 
43 
57.8 
45.. 
VPenicillium purpurogenum -. 
57.7 
52 
60.0 
53 
57.4 
54 
58.8 
55 
57.6 
56 
57.1 
57. 
J82219-2 
57.7 
73 . 
58.5 
75 
>82219-9 
56.8 
82 
57.3 
83 
58.3 
84 
[82219-6 
56.6 
116- 
58.2 
115 
56.8 
117 
J82219-21 
57.5 
118- 
59.2 
120... .. 
57.2 
94 
57.9 
95 
55.4 
10 
56.3 
11 
50.0 
19 
57.7 
20 
59.0 
34 — . 
56.7 
35 
58.6 
48 
59.7 
46 
56.0 
91 
56.6 
92 
j-10918-7 
56.1 
103 
57.0 
104 
81318-1 
57.4 
13 
57.3 
16 
58.0 
37 
10918-4 
. 57.1 
40 
57.5 
65 
Trichoderma sp 
58.0 
67 
Alternaria sp 
57.5 
70 
82219-1 
58.5 
85 
Trichoderma sp . 
57.6 
88 
if ucor sp. . 
56.7 
112 
82219-6 
58.6 
122 
Mucor sp 
58.5 
