59 
Table VI. — Adhesion of Spikes hi Tics — Continued. 
I Yellow Tine, 4 by 8 inches j cut ill winter of 1880.] 
5. ;>o 
5.00 
5. 50 
5. 50 
5. 50 
£-inch 
Lag-screw 
1. 8(1 
4. 80 
4.40 
4.C5 
4. 70 
4.70 
3 in. of 
screw 
Tension in pounds on spike. 
::, -jiHi 
3, 195 
1, 31)0 
1,050 
3,750 
1,200 
1, 500 
2,400 
3,510 
1,210 
1, 250 
1, 
1,050 
1,550 
1,900 
2, 590, 
g-in., 
2, 900 
1,014 740 
840 
1,280 
995 
1,300 
1, 400 
940 
980 
1, 020 
Remarks. 
New York Central'and Hud- 
son River Railroad spike 
driven tangentially to 
layers ; after yielding fell 
to 1,500. 
New York Cent ral and Hud- 
son River Railroad spike; 
pull fluctuated between 
1,300 and 2,200, until spiko 
was drawn to i of an inch. 
Boston and Albany spike. 
A-inch hole bored full length 
of spiko. 
/e-inch hole bored full 
length of spike. 
g-inchbolc bored full length 
of spike. 
Lag-screw driven in same 
block with spike ham- 
mer. 
[Yellow Pine, 4 by 8 inches, seasoned nine years.] 
5. GO 
5. 40! 
4. 50 
3. 00 
4. 80 
3. 00 
3, 340 
3, 640 
3, 445 
1,870 
2,240 2,040 
2,595 2,000 
2, 110 2, 0801 
1,320 1,050 
1,800 
2, 560 
1,480 
1, 980 
1,790 1 
5(i0 
920 
1,500 
940 
920 
235' 
At 3 inches, 310; sudden 
drop to 2,700. 
At 3J inches, 180. 
[White Cedar ] 
5. 50 
5. 50 
5. 50 
5. 00 
(Lag-screw) 
* 
(Lag-screw) 
4. 90 
4. 70 
4. 70 
5. 00 
3. 40 
2. 80 
3.40 
2. 80 
2, 305 
1,400 
1,755 
1,320 
2,200 
2, 190 
1, 170 
1, 360 
1, 150 
2, OfO 
16- 
26. 10 
2,825 1,950 
2, 010 
1,080 
1, 250 
1,010 
840 
1, 150 
1,640 
830 
1, 050 
680 
480 
580 
1, 240 : 760 
680 
530 
290 
420 
Sharp-pointed spiko. 
i-inch hole bored full length 
of spike, 
g-inchbole bored full length 
of spike. 
Blunt-pointed spike had 
broken the wood, 
l-incb hole bored. 
Spike was drawn j\ of inch 
at 2,700; -g-inch hole 
bored. 
[ White Oak, fine quality, in service two years and three months.] 
5. 50 
5. 50 
5. 60 
5. 70 
5. 70 
6. 00 
4 
4. 60 
4. 70 
4. 90 
4. 80 
5. 30 
III 
70 4,490 3,490 2,910 2,150 
3,360 2,700 2,220 1,280 
1,620 1,220 
670! 
4,330 3,200, 3,010 2,880 2,250 1, f 
6, 593 5, 695 5, 480 4, 800 4, 250 1 3, c 
2, 2, 140 
10 2, 90o' 2, 150 
830 
gin., 
970 4,80(1 
4, 580 
3, 900 
3, 390 
2, 480 
1,420 
2, 400 
1,820 
460 
920 
1, 120 
Spiko as driven by railroad 
company. 
Ohl spike red riven in old 
hole thirty bours before 
test. 
New spike in solid wood. 
A-inch bole bored full length 
of spike. 
Old spike redriven thirty- 
one hours before test. 
Spiko as driven by railroad 
company. 
Suddenly drew to l-iuch at 
first load; experiment re- 
peated to confirm experi- 
ment 30. 
