ABSORPTION AND PENETRATION OF COAL TAR AND CREOSOTE. 19 
8 4 
52 
I 5 
z 
S 
&4 
|i 
Kg 3 
ii 
I' 
PENETRANCE TESTS. 
(Data in Table 20.) 
°z-----=^=^ 
130 140 150 160 170 180 190 200 210 220 
6 
Jl 
_/ 
<> ^ 
^ ** <» 
—IP- 
130 140 150 160 170 180 190 200 210 220 
-1 
1 
g .12 
-i 
1 
1 -08 
j 
^1 
X 
< 
*n Ad. 
§ ' 04 
oc 
u 
5f o 
130 140 150 160 170 180 190 200 210 220 
TEMPERATURE- DEGREES FAR. 
Fig. 11.— The relative absorptions and penetrations into longleaf pine of a mixture of equal parts of creosote 
No. 4 and a normal by-product coke-oven tar No. 1 at different temperatures (normal amount of free 
carbon in tar, 6 per cent, by weight). Time of treatment, 2 hours; pressure, 75 pounds per square inch. 
