28 
BULLETIN 607, U. S. DEPARTMENT OF AGRICULTURE. 
Specific gravity, 1.105 at 60° C. The index of refraction values are almost entirely 
in the range for mixed creosotes. The sulphonation residues do not indicate the 
presence of paraffine oils. The nature of the residue is not such as to show the presence 
of undistilled tar. The appearance and physical properties of the fractions indicate 
a high boiling creosote oil. 
Creosote Xo. 6. — The distillation is as follows: 
Temperature. 
Distillation. 
°C. 
180 
Per cent. 
2.0 
37.7 
5.2 
9.5 
11.7 
8.6 
25.0 
0.3 
235 
245 
275 
305 
330 
Residue 
Loss 
Total 
100.0 
Specific gravity. 1.047 at 60° C. The index of refraction values lie mostly in the 
range for mixed creosotes. The sulphonation residues are too high for a straight 
coal-tar creosote and their character is much like that of petroleum oils. The amount 
of residue above 330° is rather large, but there is no sign of undistilled tar in it. 
Table 1. — Data upon the relative absorptions and penetrations into longleaf pine of 
mixtures of creosote Xo. 4 and carbon-free by-product coke-oven tar Xo. 1 {normal 
amount of free carbon in tar, 6 per cent, by weight). 
Specimen No. 
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. 
Tar 
No. 1. 
Creo- 
sote 
No. 4. 
Free 
carbon 
in mix- 
ture. 
Specific 
gravity 
at 
140° F. 
(60° C.) 
Viscos- 
itvat 
160° F. 
(Engler 
viscosi- 
meter). 
19A 
13.0 
17.5 
P. ct. 
by vol- 
ume. 


P. ct. ! 
by vol- ; P. ct. by 
ume. 1 weight. 
100 1 Trace. 
100 Trace. 
1.071 
1.071 
1.2 
1.2 
Lbs. 
4.970 
4.270 
Lbs. 
0.250 
.195 
7ns. 
7.00 
35... 
6.05 
Average 
15.3 
.223 
6.53 
25 
25 
75 
75 
Trace. 
Trace. 
1.102 
1.102 
1.4 
1.4 
4,783 
4.800 
28... 
12.0 
14.5 
.168 
.266 
5.00 
23A 
7.64 
Average 
13.3 
15.0 
15.0 
.217 
6.32 
50 
50 
50 
50 
Trace. 
Trace. 
1.127 
1.127 
1.6 
1.6 
4.458 
4.825 
32... 
.122 
.107 
4.34 
22A 
4.44 
Average 
15.0 
11.5 
13.0 
.115 
4.39 
75 
75 
25 
25 
Trace. 
Trace. 
1.150 
1.150 
2.3 
2.3 
4.504 
4.677 
?P 
.090 
.119 
3.25 
24A. 
Average 
4.05 
12.3 
.105 
3.65 
100 
100 


Trace. 
Trace. 
1.182 
1.182 
3.6 
3.6 
4.566 
4.463 
30... 
13.5 
16.5 
.069 
.055 
4 19 
20A 
2 76 
Average 
15.0 
.062 
3.48 
Average moisture in specimens ab»ut 2 per cent. 
