574 Philippine Jownal of Science lois 
Table III . — Ropes made of Philippine fibers arranged in the order of mean 
tensile strength when dry, etc. — Continued. 
ROPES MADE OF MISCELLANEOUS FIBERS. 
No. 
Fiber. 
Mean dry tensile 
strength. 
Per sq. 
cm. 
Per sq. 
inch. 
Kilos. 
Lbs. 
1 
Musa textilis; grade "G” abacd; rope, 16 mm. in circumference® 
1 , no 
15. 700 
2 
Musa textilis: grade “F” abacd; rope. 15 mm. in circumference® 
974 
13, 800 
S 
Musa textilis; grade "F” abaci; rope, 31 mm. in circumference® 
943 
13,400 
4 
Musa textilis; grade "G” abaci; rope, 26 mm. in circumference®. 
744 
10, 600 
5 
Agave cantala; maguey; grade, Cebu No. 2 ®_ 
739 
10, 4C0 
6 
Dendrocalamus merrillianus ^ 
■ 237 
3,380 
7 
Corypha elata; leaf of jf>a]T[i 
232 
3,300 
8 
Corypha data: buntal; vascular fibers in petioles 
222 
3, 150 
9 
Cocos nucifera; rope, 60 mrn. in circumference c 
185 
2, 640 
10 
Cocos nucifera: Tope, 24 mm, in circumference 4 
176 
2,490 
11 
Cocos nucifera: rope, 44 mm. in circumference 4 
170 
2, 420 
12 
149 
2,120 
490 
6. 950 
"Machine-made rope; all other ropes are handmade. 
’> This rope has two strands only ; all other ropes have three strands. 
' Rope made at Caoayan, Ilocos Sur, from salt-water retted coir. 
^ Rope made of coir that had been machine cleaned at the Bureau of Science from Laguna 
husks. 
« Rope made of the entire stem of the vine. 
diately at the end of this period, while still saturated, and are 
referred to as wet tests. 
Elongation . — The test specimens were fixed in the testing 
machine in a vertical position by passing steel pins 40 milli- 
meters in diameter through the eyes of the splices; they were 
subjected to an initial tension not exceeding 5 pounds, to 
facilitate marking the gauge length, which was either 50 or 
100 centimeters, and were measured to an accuracy of 0.5 cen- 
timeter. The load was then applied at a uniform rate so that 
the specimens stretched 1.3 millimeters per second; therefore, 
the total elongation divided by 1.3 gave the duration of the 
test. During the time the load was being applied the zero of 
a scale graduated in 0.5 centimeter was constantly kept aligned 
with the lower gauge mark, the progress of the upper gauge 
mark was constantly noted, and the reading on the scale was re- 
corded when the specimen broke. The difference between this 
reading and the gauge length gave directly the elongation which, 
vv^hen divided by the gauge length and multiplied by 100, gave 
the percentage of elongation. The elongations recorded are 
