42 
BULLETIN" 607, U. S. DEPARTMENT OF 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 composition 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 PL VI.) 
Table E. — Showing tempera- 
ture of treatment. 
(See penetrance specimens on PI. XI. 
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 
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. 
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. 
