ABSORPTION" AND PENETRATION OF COAL TAR AND CREOSOTE. 29 
Table 2. — Data upon the relative absorptions and penetrations into longleaf pine of 
mixtures of creosote No. 4 and carbon-free by-product coke-oven tar No. 2 (normal 
amount of free carbon in tar, 16 per cent, by weight). 
Aver- 
age 
num- 
ber 
annual 
rings 
per 
inch. 
Character of preservative. 
Weight 
of speci- 
men 
directly 
before 
treat- 
ment. 
Pre- 
serva- 
tive 
ab- 
sorbed. 
Aver- 
age 
longi- 
tudinal 
pene- 
tration. 
Specimen No. 
Tar 
No. 2. 
Creo- 
sote 
No. 4. 
Free 
carbon 
in mix- 
ture. 
Specific 
gravity 
at 
140° F. 
(60° C.) 
Viscos- 
ity at 
160° F. 
(Engler 
viscosi- 
meter). 
C-6 
13.0 
15.0 
P. ct. 
by vol- 
ume. 


P. ct. 
by vol- 
ume. 
100 
100 
P. ct. by 
weight. 
Trace. 
Trace. 
1.071 
1.071 
1.2 
1.2 
Lbs. 
4.059 
4.506 
Lbs. 
0.241 
.139 
Ins. 
7.31 
B-5 
4.25 
14.0 
.190 
5.78 
25 
25 
75 
75 
Trace. 
Trace. 
1.105 
1.105 
1.4 
1.4 
4.132 
4.237 
C-4 
13.0 
14.0 
.103 
.167 
3.89 
B-6 
4.71 
Average 
13.5 
.135 
4.30 
SO 
50 
50 
5© 
Trace. 
Trace. 
1.132 
1.132 
1.7 
1.7 
4.109 
4.220 
C-5 
14.5 
14.0 
.111 
.089 
4.34 
B-3 
3.68 
14.3 
.100 
4.01 
75 
75 
25 
25 
Trace. 
Trace. 
1.163 
1.163 
2.2 
2.2 
4.175 
4.185 
C-3 
11.0 
13.0 
.041 
.033 
2.71 
B-2 
1.90 
Average 
12.0 
.037 
2.31 
100 
100 


Trace. 
Trace. 
1.215 
1. 215 
3.1 
3.1 
4.216 
3.070 
C-2 
9.0 
16.0 
.035 
.021 
1.25 
B-l 
1.42 
12.5 
.028 
1.34 
Average moisture in specimens about 4.5 per cent. 
Table 3. — Data upon the relative absorptions and penetrations into longleaf pine of 
mixtures of creosote No. 4 and carbon-free gas-house tar No. 3 {normal amount of free 
carbon in tar, 30 per cent, by weight). 
Aver- 
age 
num- 
ber 
annual 
rings 
per 
inch. 
Character of preservative. 
Weight 
of speci- 
men 
directly 
before 
treat- 
ment. 
Pre- 
serva- 
tive 
ab- 
sorbed. 
Aver- 
age 
longi- 
tudinal 
pene- 
tration. 
Specimen No. 
Tar 
No. 3. 
Creo- 
sote 
No. 4. 
Free 
carbon 
in mix- 
ture. 
Specific 
gravity 
at 
140° F. 
(66° C.) 
Viscos- 
ity at 
160° F. 
(Engler 
viscosi- 
meter). 
A-F-4 
21.0 
21.0 
Per 
cent by 
volume. 


Per 
cent by 
volume.. 
100 
100 
Per 
cent by 
■weight. 
Trace. 
Trace. 
1.071 
1.071 
1.2 
1.2 
Lbs. 
4.272 
4.124 
Lbs. 
0.117 
.121 
Ins. 
5.55 
A-E-3 
4.65 
Average 
21.0 
.119 
5.10 
25 
25 
7S 
75 
Trace. 
Trace. 
1.097 
1.097 
1.4 
1.4 
4.219 
4.026 
A-F-2 
20.0 
22.0 
.054 
.054 
3.62 
A-E-6. 
3.20 
Average 
21.0 
.054 
.015 
.014 
3.41 
50 
50 
50 
50 
Trace. 
Trace. 
1.127 
1.127 
1.6 
1.6 
3..855 
3.750 
A-F-l 
20.0 
20.0 
1.60 
A-E-7 
1.43 
Average 
20.0 
.015 
.010 
.011 
1.52 
75 
75 
25 
25 
Trace. 
Trace. 
1.148 
1.148 
2.3 
2.3 
2.063 
2.096 
A-F-5a 
21.0 
19.0 
1.00 
A-E-5a 
1.15 
Average 
20.0 
.011 
1.08 
100 
100 


Trace. 
Trace. 
1.179 
1.179 
3.8 
3.8 
1.697 
1.990 
A-E-2a 
20.0 
22.0 
.012 
.007 
1.15 
A-F-3a 
.75 
Average 
21.0 
.010 
.95 
Average moisture in specimens about 9 per cent. 
