26 BULLETIN 607, U. S. DEPARTMENT OF AGRICULTURE. 
Analyses of creosotes used in the experiments. 
Creosote No. 1. — The distillation is as follows: 
Temperature. 
Distillation. 
°C. 
205 
Per cent. 
11.0 
28.3 
5.1 
9.7 
13.1 
6.9 
25.8 
0.1 
235 
245 
275 . 
305 
320 
Residue 
Loss 
Total 
100.0 
Specific gravity, 1.0483 at 60° C. The index of refraction values are low for coal-tar 
creosote, and the water content is high, being 8.4 per cent of the original oil. The 
residue indicates the presence of undistilled tar, probably about 10 per cent. 
Creosote No. 2. — The distillation is as follows: 
Temperature. 
Distillation. 
°C. 
205 
Per cent. 
6.8 
40.0 
4.5 
13.4 
11.0 
24.1 
0.2 
235 
245 
275 
305 
Residue 
Loss 
Total 
100.0 
Specific gravity, 1.0475 at 60° C. The distillation curve and the index of refraction 
values for the most part fall within the range ascribed to a pure coal-tar creosote, but 
there is a decided tendency in the index of refraction values for the higher fractions, 
which indicates the presence of petroleum-like substances. 
Creosote No. 3. — The distillation is as follows: 
Temperature. 
Distillation. 
°C. 
205 
Per cent. 
4.6 
27.4 
5.1 
21.3 
11.6 
22.7 
7.0 
0.3 
235 
245 
285 
305 
360 
Residue 
Loss 
Total 
100.0 
