584 Philippine Journal of Science 1919 
Table VIII . — Physical tests of rope made of Abroma fastuosa. 
Crude fiber 
strips: not 
retted, a 
Retted fiber; 
fairly clean. b 
Mean diameter: 
11.5 
6.1 
0. 45 
0. 24 
Mean perimeter, or girth: 
36 
19 
1.42 
0. 75 
True mean sectional area: 
Square millimeters 
88.4 
24.4 
0.187 
0.037 
Ultimate tensile strength (dry): 
Mean in kilograms __ 
482 
167 
Maximum in kilograms 
B83 
166 
Minimum in kilograms 
388 
147 
Mean in pounds 
1,063 
345 
Maximum in pounds 
1,285 
365 
Minimum in pounds 
865 
325 
Ultimate tensile strength (wet) : 
Mean in kilograms __ 
282 
(c) 
Maximum in kilograms 
336 
(') 
Minimum in kilograms 
220 
(') 
Mean in pounds 
621 
0 ) 
Maximum in pounds - 
740 
(«=) 
Minimum in pounds 
485 
(<=) 
Mean ultimate tensile strength per unit area (dry): 
Kilograms per square centimeter . 
545 
643 
Pounds per square inch .. . _ 
7,760 
9,100 
Mean ultimate tensile strength per unit area (wet): 
Kilograms per square centimeter 
319 
(<=) 
Pounds per square inch 
4,530 
(*=) 
Mean elongation at instant of rupture: 
Dry - - -.per cent 
12 
(') 
Wet --- - --do 
13 
0 ) 
Mean weight per unit length: 
Grams per meter - 
83.7 
20.2 
Pounds per foot — - 
0. 0562 
0. 0136 
Average breaking length: 
5. 770 
7,740 
25, 400 
14.3 
18, 900 
13. 67 
Moisture per cent-. 
= Made at Disdls, Benguet Subprovince. ^ Made at Sappaac, Abra Province. No test 
made. 
Comparative tests performed by Roxburgh on the tensile 
strength of two “lines” made of Abroma fastuosa bast in the 
dry and wet condition, respectively, show an average gain of 12 
pounds for the wetted line made from the fiber procured from 
Through Royle, Forbes, Fibrous Plants of India Fitted for Cordage, 
Clothing, and Paper. Smith, Elder and Co., London; Smith, Taylor 
and Co., Bombay (1855) 268. 
