598 
Philippine Journal of Science 
1919 
Table XVI. — Physical tests of rope made from the bast of Sterculia 
oblongata. 
[Rope made at Disdis, Benguet Subprovince.] 
Mean diameter: 
Millimeters 12.1 
Inches 0.48 
Mean perimeter, or girth : 
1.50 
Millimeters 
38 
Inches 
1. 
True mean sectional area: 
Square millimeters 
96. 
Square inches 
0. 
Ultimate tensile strength (dry) : 
Mean in kilograms 
382 
Maximum in kilograms 
413 
Minimum in kilograms 
351 
Mean in pounds 
842 
Maximum in pounds 
920 
Minimum in pounds 
775 
Ultimate tensile strength (wet) : 
Mean in kilograms 
279 
Maximum in kilograms 
327 
Minimum in kilograms 
241 
Mean in pounds 
615 
Maximum in pounds 
720 
Minimum in pounds 
530 
Mean ultimate tensile strength per unit area 
(dry) : 
Kilograms per square centimeter 
398 
Pounds per square inch 
5,650 
Mean ultimate tensile strength per unit area 
(wet) : 
Kilograms per square centimeter 
291 
Pounds per square inch 
4,130 
Mean elongation at instant of rupture: 
Dry (per cent) 
13 
Wet (per cent) 
14 
Mean weight per unit length : 
Grams per meter 
85. 
Pounds per foot 
0.1 
Average breaking length; 
Meters 
4,490 
Feet 
14,700 
Moisture (per cent) 
13.1 
STERCULIA STIPULARIS R. Br. Bonotan. 
Local names: Bisong (Nueva Vizcaya); bonotan, rapok (Ilocos Norte); 
bungat (Cagayan); labnai (Abra, Itneg) ; malagasdha (Tayabas). 
A medium-sized tree with oblong-ovate, rusty-pubescent, en- 
tire, acuminate leaves; flowers numerous, calyx-lobes elongated; 
capsules red, inflated; widely distributed in the Philippines at 
low altitudes. 
