C5 
Bore, 9 inch diameter; pounds to draw spike 1,545.0 
No hole bored ; pounds to draw spike 1,015.2 
Average 1,580.4 
Difference, — 69.6 j diff. : aver. :: 1 : 2-2.7. 
Bore, ^ inch diameter; pounds to draw spike 1,593.6 
No hole bored ; pounds to draw spike 1, 040. 4 
Average 1,020.0 
Difference, —52.8 ; dill'.: aver.:: 1: 30.7. 
Bore, -ftj inch diameter (without rail); pounds to draw spike 1,737.0 
No hole bored (without rail) ; pounds to draw spike 1, 802. 4 
Average 1,770. 
Difference, — 64.8; dill'.: aver.:: 1: 27.4. 
(Table VI.— Beech.)* 
Table VII. — Pine; impregnated ; wet; depth of hole bored, 5 inches. 
Bore, | inch diameter ; pounds to draw spike 1,715.7 
No hole bored ; pounds to draw spike 2,028. 
Average 1, 872. 2 
Difference, -312.9; diff.: aver.:: 1: 5.98. 
(Not bored and without rail; pounds to draw spike 1,772.4) 
Bore 7,, inch diameter ; pounds to draw spike 1,073.7 
No hole bored ; pounds to draw spike . . 1, 911. 
Average. . 1,792.4 
Difference, —237.3; diff. : aver. :: 1: 70. 
(Not bored and without rails; pounds to draw spike 1,029.0) 
Bore, i inch diameter; pounds to draw spike 1,785.0 
No hole bored ; pounds to draw spike 1, 824. 9 
Average 1,805.0 
Difference, —39.9; diff.: aver.:: 1: 45.2. 
(Not bored and without rail; pounds to draw spike • 2, 053. 8) 
*Thc results obtained from experiments with beech ties were unsatisfactory and 
not of sufficient value to be introduced. 
1>1753— Bull. No. 1 5 
