102 
Indian Forest Records. 
[VOL. VI 
TABLE XXXIV—contd. 
The figures given below are average of four tests in each case —contd. 
Species. 
Method of driving spikes. 
Direct pull 
in lbs., 
required 
to with¬ 
draw dog- 
spikes, be¬ 
ing the 
average 
of 4 tests. 
Remarks. 
Shorza robusta 
Hole bored f" right 
5,155 
Spikes released somewhat 
Ditto 
through the sleeper 
and spike driven home. 
Hole bored deep 
4,366 
slowly. 
In one case spikes re¬ 
Ditto 
with §" augur and 
spike driven home. 
Hole bored \Y deep 
4,156 
leased suddenly. In 
other cases spikes re¬ 
leased somewhat slowly. 
Ditto 
Ditto 
with augur and 
spiko driven home. 
Hole bored 1 Y deep 
3,869 
Spikes released somewhat 
Pmus longij'olia or 
4 Chir ’ Powellized 
old sleeper, having 
been 3 years in the 
line. 
Dipterocarpus alatus 
with f" augur and 
spike driven home. 
Hole bored through 
3.038 
slowly. 
The spike released slowly. 
sleeper, and spike 
driven home. 
Hole bored §" and 1|" 
8,210 
Spike released slowly. 
Ditto 
deep, spike driven 
home. 
Y hole bored through 
6,202 
Ditto 
Ditto 
sleeper and spike 
driven home. 
Y hole bored through 
5,587 
Ditto 
Dipterocarpus 
tuber - 
sleeper and spike 
driven home. 
Hole bored §" and 1 Y 
8,315 
Spike released suddenly. 
culatus. 
Ditto 
deep, spike driven 
home. 
Y hole bored through 
8,345 
Spike released slowly. 
Ditto 
sleeper and spike 
driven home. 
Ditto 
6,765 
Ditto 
Dipterocarpus 
pilo- 
Hole bored -§" and 1 Y 
6,870 
Ditto 
sus. 
Ditto 
deep, spike driven 
home. 
Y hole bored through 
5,575 
Ditto 
Ditto 
sleeper and spike 
driven home. 
|" hole bored through 
5,030 
Ditto 
Silver fir 
sleeper and spike 
driven home. 
No hole bored previous 
1,993 
Ditto 
Spruce . 
• 
to driving spike. 
Ditto 
2.477 
Ditto ) 
[ 232 ] 
