30 
BULLETIN 607, U. S. DEPARTMENT OF AGRICULTURE. 
Table 4. — Data upon the relative absorptions and penetrations into longleaf pine of 
mixtures of equal parts of creosote No. 4 and three different carbon-free and normal free- 
carbon tars. 
Aver- 
age 
num- 
ber 
Character of preservative. 
Weight 
of speci- 
men 
directly 
before 
treat- 
ment. 
Pre- 
serva- 
tive ab- 
sorbed. 
Specimen No. 
Tar Nos. 1, 2, 
and 3. 
Creo- 
sote 
No. 4. 
Free 
carbon 
in mix- 
ture. 
Specific 
gravity 
at 140° 
F.(60° 
C) 
Yiscos- 
itv at 
160° F. 
(Engler 
vicosi- 
meter). 
Aver- 
age 
longi- 
rings 
per 
inch. 
Bv 
vol- 
ume. 
Free 
carbon 
normal 
to tar. 
pene- 
tration. 
II-3 
24.0 
18.0 
Per 
cent. 
50 
50 
Per 
cent. 
6 
6 
Per 
cent by 
volume. 
50 
50 
Per 
cent by 
weight. 
Trace. 
Trace. 
1.127 
1.127 
1.6 
1.6 
Lbs. 
1.443 
2.826 
Lbs. 
0.127 
.200 
Ins. 
3.75 
ITI-2 
4.19 
21.0 
.164 
3 97 
50 
50 
16 
16 
50 
50 
Trace. 
Trace. 
1.132 
1.132 
1.7 
1.7 
3.450 
3.185 
H-8 
17.0 
20.0 
.130 
.080 
4.30 
III-5 
3.12 
Average 
18.5 
.105 
.053 
.076 
3.71 
50 
50 
30 
30 
50 
50 
Trace. 
Trace, 
1.127 
1.127 
1.6 
1.6 
3.010 
2.660 
II-5 
22.0 
17.0 
2.27 
III-l 
2.18 
Average 
19.5 
.065 
2 23 
50 
50 
6 
6 
50 
50 
3.0 
3.0 
1.132 
1.132 
1.7 
1.7 
1.420 
1.386 
II-2-B.. 
18.0 
24.0 
.038 
.054 
2.05 
III-2-B 
2.00 
Average 
21,0 
.046 | 2.03 
50 
50 
16 
16 
50 
50 
8.0 
8.0 
1.159 
1.159 
2.6 
2.6 
II-l-A 
22.0 
15.0 
1.410 
1.452 
.043 
.029 
2.28 
III-6-B 
1 .14 
Average 
18.5 
.036 1 1.91 
50 
50 
30 
30 
50 
50 
15.0 
15.0 
1.166 
1.166 
2.5 
2.5 
II-4-A 
21.0 
18.0 
1.466 
1.318 
.027 
.017 
1.15 
III-2-A 
1 12 
Average 
19.5 
.022 i 1 14- 
1 
Average moisture in specimens about 8 per cent. 
