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 No. 6. — The distillation is as follows: 



Temperature. 



Distillation. 



°C. 

 180 



Per cent. 



2.0 



37.7 



235 



245 



275 



5.2 

 9.5 



305 



330 



Residue 



Loss 



11.7 

 8.6 



25.0 

 0.3 



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 No. 4 and carbon-free by-product coke-oven tar No. 1 (normal 

 amount of free carbon in tar, 6 per cent, by weight). 





Aver- 

 age 



num- 

 ber 

 annual 



rings 

 per 



inch. 





Character ofpres 



jrvative. 



Weight 

 of speci- 

 men 

 directly 

 before 

 treat- 

 ment. 



Pre- 

 serva- 

 tive 

 ab- 

 sorbed. 



Aver- 

 age 



longi- 

 tudinal 



pene- 

 tration. 



Specimen No. 



Tar 

 No. 1. 



Creo- 

 sote 

 No. 4. 



Free 

 carbon 

 in mix- 

 ture. 



Specific 

 gravity 



at 

 140° F. 

 (60° C.) 



Viscos- 

 ity at 

 160° F. 

 (Engler 

 viscosi- 

 meter). 



19A 



13.0 

 17.5 



P. ct. 

 by vol- 

 ume. 

 

 



P. ct. 

 by vol- 

 ume. 

 100 

 100 



P. ct. by 



weight. 

 Trace. 

 Trace. 



1.071 

 1.071 



1.2 

 1.2 



Lbs. 

 4.970 

 4.270 



Lbs. 



0.250 



.195 



Ins. 

 7.00 



35 



6.05 









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 



.16S 

 .266 



5.00 



23A 



7.64 









13.3 



.217 



6.32 





50 

 50 



50 

 50 



Trace. 

 Trace. 



1.127 

 1.127 



1.6 

 1.6 



4.458 

 4.825 





32 



15.0 

 15.0 



.122 

 .107 



4.34 



22A 



4.44 









15.0 



.115 



4.39 





75 

 75 



25 

 25 



Trace. 

 Trace. 



1.150 

 1.150 



2.3 

 2.3 



4.504 

 4.677 





29 



11.5 

 13.0 



.090 

 .119 



3.25 



24A 



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 









15.0 



.062 



3.48 



















Average moisture in specimens about 2 per cent. 



