34 
BULLETIN 607, t T . S. DEPARTMENT OF AGRICULTURE. 
Table 10. — Data upon the relative absorptions and penetrations into longleaf pine of 
mixtures of equal parts of creosote _Vo. 4 and tar No. 3 containing different amounts of 
free carbon (normal amount of free carbon in tar, 30 per cent, by ueight). 
Aver- 
age 
num- 
ber 
annual 
rings 
per 
inch. 
Character of preservative. 
Weight 
of speci- 
men 
direct- 
ly be- 
fore 
treat- 
ment. 
Pre- 
serva- 
tive 
ab- 
sorbed. 
Aver- 
Specimen No. 
Tar 
No. 3. 
Creo- 
sote 
No. 4. 
Free 
carbon 
in mix- 
ture. 
Specific- 
gravity 
at 
140° F. 
(60° C.) 
Viscos- 
ity at 
160° F. 
(Engler 
viscosi- 
meter). 
age 
longi- 
tudinal 
pene- 
tration. 
n-7 
14.0 
15.0 
P. ct. 
by vol- 
ume. 
50 
50 
P. ct. 
by vol- 
ume. 
50 
50 
P.tf.by 
w t igh t . 
Trace. 
Trace. 
1.127 
1.127 
1.6 
1.6 
Lbs. 
11.580 
4. 187 
Lbs. 
.053 
.029 
Ins. 
3.16 
H-4 
2-82 
14.5 
.041 
2.99 
n-5 
H-l 
14.0 
12.0 
50 
50 
50 
50 
4.5 
4.5 
1 . 133 
1.132 
1.7 | 4.665 
1.7 1 U.667 
.045 
.023 
2.30 
1.69 
Average 
13.0 
.034 
2.00 
II-4 
12.0 
12.0 
50 
50 
50 
50 
6 
6 
1.142 1 1.9 1 4.453 
1.142 | 1.9 1 4.357 
.019 
.007 
2.25 
H-7 
1.13 
12.0 
.013 
1.69 
II-4A 
12.0 
13.0 
50 
50 
50 
50 
8 
8 
1.146 
1.146 
2.0 | i 1.704 
2.0 J 4.097 
.031 
.010 
1.50 
H-6 
1.25 
12.5 
.021 
1.38 
II-7A 
14.0 
13.5 
50 
50 
50 
50 
12 
12 
1.152 
1.152 
2.5 I 4.407 
2.5 1 4.040 
.037 
.007 
2.54 
H-5 
1.18 
13-8 
.022 
1.86 
II-3 
14.0 
13.0 
50 
50 
50 
50 
15 
15 
1.166 
1.166 
2.5 
2.5 
»1.826 
1.664 
• 03S 
.016 
3.00 
H-3 
1.39 
! 
13.5 
' 
.027 
2.20 

1 1 
i Short specimens. 
Average moisture in specimens about 6 per cent. 
Table 11. — Treatments of paving blocks with 50 per cent creosote No. 4 and 50 per cent 
tar No. 1 having varying percentages of carbon. 
Block 
tag No. 
Dimensions of 
block. 
Weight 
before 
treat- 
ment. 
Preserv- 
ative 
absorbed. 
Preservative 
used. 
Pressure. 
Time 
of treat- 
ment. 
Prod- 
uct of 
pres- 
sure by 
time." 
19 
30 
Inches. 
7.70 by 3.75 bv 4.0... 
8.15 by 3.50 by 4.2... 
Pounds. 
2. 830 
2.860 
Pounds 
per 
cubic 
feet. 
15.0 
14.8 
50 per cent creosote.. 
50 per cent tar with 
1J per cent carbon. 
Pounds 
per 
square 
inch. 
80 
C 1 ) 
Hours. 
4 
300 
Average 
14.9 
397 
7.70 by 3.84 by 4.0... 
8-20 by 3.60 by 4.15.. 
2.855 
2.900 
49 
10.2 
15.2 
50 per cent creosote . . 1 80 
50 per cent tar with 1 (') 
3 per cent carbon. 1 
5 
5| 
380 
54 
490 
Average . . 
15.7 
435 
1 Five hours at 80 pounds; 1 hour to obtain pressure up to 150 pounds. 
* Four hours at 80 pounds; 1 hour to obtain pressure up to 150 pounds; one-half hour at 150 pounds 
In all tests one-half hour was taken to obtain pressure up to 80 pounds. 
