ABSORPTION AND PENETRATION OF COAL TAR AND CREOSOTE. 29 



Table 2. — 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. 2 (normal 

 amount of free carbon in tar, 16 per cent, by weight). 





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. 



Specimen No. 



Tar 

 No. 2. 



Creo- 

 sote 

 No. 4. 



Free 

 carbon 

 in mix- 

 ture. 



Specific 

 gravity 



at 

 140° F. 

 (60° C.) 



Viscos- 

 ity at 

 160° F. 

 (Engler 

 viscosi- 

 meter). 



C-6 



13.0 

 15.0 



14.0 



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. 059 

 4.506 



Lbs. 



0.241 



.139 



Ins. 

 7.31 



B-5 



4.25 











.190 



5.78 





25 

 25 



75 



75 



Trace. 



Trace. 



1.105 

 1.105 



1.4 

 1.4 



4.132 

 4.237 





C-4 



13.0 



14.0 



.103 



.167 



3.89 



B-6 



4.71 









13.5 



.135 



4.30 





14.5 

 14.0 



50 



50 



Trace. 



1.132 



1.7 

 1.7 



4.109 

 4.220 





C-5 



.111 

 .089 



4.34 



B-3 



50 50 



Trace. 1. 132 



3.68 













14.3 



.100 



4.01 





75 

 75 



25 

 25 



Trace. 1.163 

 Trace. 1.163 



2.2 

 2.2 



4.175 



4.185 





C-3 



11.0 

 13.0 



.041 

 .033 



2.71 



B-2 



1.90 









12.0 



.037 



2.31 





100 

 100 





 





3.1 

 3.1 



4.216 

 3.070 





C-2 



9.0 



16.0 



Trace. 

 Trace. 



1.215 

 1.215 







.035 

 .021 



1.25 



B-l 



1.42 









12.5 



.028 



1.34 





















Average moisture in specimens about 4.5 per cent. 



Table 3. — Data upon the relative absorptions and penetrations into longleaf pine of 

 mixtures of creosote No. 4 and carbon-free gas-house tar No. 3 {normal amount of free 

 carbon in tar, SO per cent, by vjeight). 





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. 



Specimen No. 



Tar 



No. 3. 



Creo- 

 sote 

 No. 4. 



Free 

 carbon 

 in mix- 

 ture. 



Specific 

 gravity 



at 

 140° F. 

 (60° C.) 



Viscos- 

 ity at 

 160° F. 

 (Engier 

 viscosi- 

 meter). 



A-F-4 



21.0 

 21.0 



Per 



cent by 



volume. 











Per 



cent by 



volume. 



100 



Per 



cent by 

 weight. 



1.071 

 1.071 



1.2 

 1.2 



Lbs. 

 4.272 

 4.124 



Lbs. 



0.117 

 .121 



Ins. 



• A-E-3 



100 Trace. 



4.65 











Average 



21.0 



.119 



5.10 





25 

 25 



75 

 75 



Trace. 

 Trace. 



1.097 

 1.097 



1.4 

 1.4 



4.219 

 4.626 





A-F-2 



20.0 

 22.0 



.054 

 .054 



3 62 



A-E-6 



3.20 







Average 



21.0 



.054 



3.41 





50 

 50 



50 

 50 



Trace. 

 Trace. 



1.127 

 1.127 



1.6 

 1.6 



3.855 

 3.750 





A-F-l 



20.0 

 20.0 



.015 

 .014 



1.60 



A-E-7 



1 43 







Average 



20.0 



..015 



1.52 





75 

 75 



25 

 25 



Trac«. 

 Trace. 



1.148 

 1.148 



2.3 

 2.3 



2.06! 

 2.096 





A-F-5a 



21.0 

 19.0 



.010 

 .011 



1 00 



A-E-5a 



1 15 







Average 



20.0 





.011 



1 08 





100 

 100 





 





3.8 

 3.8 



1.697 

 1.990 





A-E-2a 



20.0 

 22.0 



Trace. 

 Trace. 



1.179 

 1.179 



.012 

 .007 



1 15 



A-F-3a 



75 







Average 



21.0 





.010 



.95 















Average moisture in specimens about 9 per cent. 



