84 
Mycologia 
TABLE I 
Durability of Sapwood after 4 Months’ Test* 
[An asterisk (*) denotes that the blocks became too wet for a fair test.] 
Kind of Wood 
Flask 
Oven-Dry 
Weight (Grams) 
Loss 
Remarks 
No. 
Before 
Test 
After 
Test 
Grams 
Per 
Cent, 
Eastern hemlock 
I 
6.44 
5-25 
1. 19 
18.5 
Considerably rotted. 
Mountain hemlock. . . . 
I. 
7-39 
7.07 
0.32 
4 - 3 * 
Western hemlock 
4 
7.87 
5-67 
2.20 
28.0 
Seriously rotted. 
Engelmann spruce 
4 
6-35 
4-51 
1.84 
29.0 
Seriously rotted. 
Sitka spruce 
4 
5-49 
4.61 
0.88 
14.2* 
Red spruce 
4 
6.79 
4.98 
1. 81 
26.7 
Rotted at ends. 
White spruce 
4 
6.25 
4-51 
1.74 
27.8 
Seriously rotted. 
Alpine fir 
4 
6.19 
4.76 
1-43 
23-1 
Seriously rotted. 
Grand fir 
4 
7-30 
6.90 
0.4 
5 - 5 * 
Grand fir 
4 
5-98 
4-58 
1.40 
23-4 
Seriously rotted. 
Noble fir 
4 
6.73 
S-OS 
1.68 
25.0 
Seriously rotted. 
Douglas fir 
7 
7-36 
5-42 
1.94 
26.4 
Seriously rotted. 
European larch 
4 
7.16 
6.44 
0.72 
10. 0* 
Western yellow pine. . . . 
I 
6.6s 
S -03 
1.62 
24.4 
Seriously rotted. 
Lodgepole pine 
I 
6.80 
5-37 
1-43 
21.0 
Seriously rotted. 
Longleaf pine 
7 
7-93 
S-Si 
2.42 
30.5 
Seriously rotted. 
Shortleaf pine 
7 
8.46 
6.34 
2.12 
25-1 
Seriously rotted in 
springwood. 
Table mountain pine. . . 
I 
7-33 
6.69 
0.64 
8.7* 
Pitch pine 
I 
8.65 
6-55 
2.10 
24-3 
Seriously rotted. 
White pine 
I 
4.12 
3-o6 
1.06 
25-7 
Seriously rotted. 
Sugar pine 
I 
S-ii 
3-94 
1. 17 
22.9 
Seriously rotted. 
Western white pine. . . . 
I 
6.40 
S -30 
1. 10 
17.2 
Considerably rotted. 
White cedar 
7 
4-52 
4-50 
0.02 
* 
Western red cedar 
7 
4.76 
4-65 
O.II 
2.3* 
Port Orford cedar 
7 
6.52 
5-23 
1.29 
19.8 
Seriously rotted on 
three sides. 
California juniper 
7 
9-50 
6.81 
2.69 
28.3 
Seriously rotted. 
Western juniper 
7 
6.77 
S -30 
1.47 
21.7 
Seriously rotted. 
Bigtree 
7 
7-94 
7.72 
0.22 
2.8* 
case being tested in separate flasks. Each block was marked by 
writing its name and number on two faces with a soft heavy- 
leaded pencil. This system of marking has proven satisfactory 
and has been adopted for all work of this nature. 
The flasks were inoculated on January 29, 1914. In about a 
month the contents were uniformly infected throughout. Flasks 
II, 12, and 17, becoming contaminated with molds, were opened, 
the test blocks again oven-dried for 24 hours and new culture 
flasks prepared as before. All cultures were then kept in a glass 
case in the diffuse light of the laboratory. The temperature fluc- 
3 Data in this table and the following are based on single specimens of 
each sample of wood. 
