636 
Philippine Journal of Science 
1919 
This bast is rare and, therefore, is not commonly used for rope 
making. Filipinos say that it is suitable for wet-weather use. 
A summary of the tests of this species made in the Bureau 
of Science is given in Table XXXVII. 
Table XXXVII . — Physical tests of rope made from the bast of Bombax 
ceiba. 
[Rope made at Langiden, Abra Province.] 
Mean diameter: 
Millimeters 8.3 
Inches 0.33 
Mean perimeter, or girth: 
Millimeters 26 
Inches 1.02 
True mean sectional area: 
Square millimeters 43.0 
Square inches 0.067 
Ultimate tensile strength (dry) : 
Mean in kilograms 174 
Maximum in kilograms 184 
Minimum in kilograms 158 
Mean in pounds 383 
Maximum in pounds 405 
Minimum in pounds 348 
Ultimate tensile strength (wet) : 
Mean in kilograms 151 
Maximum in kilograms 176 
Minimum in kilograms 94.8 
Mean in pounds 332 
Maximum in pounds 387 
Minimum in pounds 209 
Mean ultimate tensile strength per unit area (dry) : 
Kilograms per square centimeter 405 
Pounds per square inch 5,720 
Mean ultimate tensile strength per unit area (wet) : 
Kilograms per square centimeter 351 
Pounds per square inch 4,960 
Mean elongation at instant of rupture: 
Dry (per cent) 8 
Wet (per cent) 10 
Mean weight per unit length: 
Grams per meter 37.7 
Pounds per foot 0.0253 
Average breaking length: 
Meters 4,620 
Feet 15,150 
Moisture (per cent) 15.78 
