42 



BULLETIN 607, U. S. DEPARTMENT OP AGRICULTURE. 



Table A. — Showing composition of treating oil. 

 (See penetrance specimens on PI. IV.) 



Piece No. 



Creosote 



No. 4, 



per cent of 



total oil by 



volume. * 



Tar No. 3, 



per cent of 



total oil 

 by volume. 



Free 



carbon, 



per cent of 



total oil by 



weight. 



1 

 2 



3 

 4 

 5 







25 



50 



75 



100 



100 

 75 

 50 

 25 

 



Trace. 

 Trace. 

 Trace. 

 Trace. 

 Trace. 



Table B. — Showing corn-position of treating oil. 

 (See penetrance specimens on PI. V.) 



Piece No. 



Creosote 



No. 4, 



per cent of 



total oil 



by 

 volume. 



Tar. 



Free 

 carbon, 



per cent of 

 total oil 



by weight. 



Tar No. 



Per cent 

 of total oil 



by 

 volume. 



Amount of 



carbon 

 normal to 



the tar, 

 per cent of 



total 



weight of 



tar. 



1 

 2 

 3 

 4 

 5 

 6 



50 

 50 

 50 

 50 

 50 

 50 



50 

 50 

 50 

 50 

 50 

 50 



6 



16 

 30 



6 

 16 

 30 



Trace. 



Trace. 



Trace. 



3 



8 

 15 



1 

 2 

 3 

 1 

 2 

 3 



Table C. — Showing composition of 

 treating oil. 



(See penetrance specimens on P 



. VI.) 



Piece No. 



Creosote 



No. 4, 



per cent of 



total oil 



by 



volume. 



Tar No. 2, 



per cent of 

 total oil 



by 

 volume. 



Carbon 



per cent 



by weight. 



1 



2 

 3 

 4 

 5 



50 

 50 

 50 

 50 

 50 



50 

 50 

 50 

 50 

 50 



Trace. 

 3 

 5 

 6.5 



8 



Table E. — Showing tempera- 

 ture of treatment. 



(See penetrance specimens on PI. XI. 





Tempera- 



Piece No. 



ture of 





treatment. 



1 



160 



2 



180 



3 



190 



4 



200 



5 



210 



Table D. — Treating oil. 

 (See penetrance specimens on PI. VII.) 



Piece No. 



Creosote 

 No. 



Treating oil. 



1 

 2 

 3 

 4 

 5 



1 



2 

 3 

 4 

 5 



Creosote containing tar (estimated at about 10 per cent). 



Creosote. 



Pure coal-tar creosote. 



Creosote containing tar (estimated at less than 5 per cent). 



High-boiling creosote. 



