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 





