626 Philippine Journal of Science 1919 
44 per cent. All of the wet specimens failed in the unspliced 
portion of the rope, and the maximum variation from the mean | 
tensile strength in the five specimens tested was 21 per cent. 
Two of the dry specimens ruptured in splices, the greatest va- 
riation from the mean being 23 per cent. Wetting appreciably 
increases the mean ultimate elongation of the rope. 
A summary of the tests of this species made in the Bureau 
of Science is given in Table XXXI. 
TABLE XXXI.—Physical tests of rope made from the bast of Ficus forsteni. 
[Rope made at Dolores, Abra Province.] 
Mean diameter: 
Millimeters 7.0 
Inches 0.28 
Mean perimeter, or girth: 
Millimeters 22 
Inches 0.87 
True mean sectional area: 
Square millimeters 38.8 
Square inches 0.060 
Ultimate tensile strength (dry): 
Mean in kilograms 59.8 
Maximum in kilograms 70.3 
Minimum in kilograms 46.3 
Mean in pounds 182 
Maximum in pounds 155 
Minimum in pounds 102 
Ultimate tensile strength (wet): 
Mean in kilograms : 86.2 
Maximum in kilograms 104 
Minimum in kilograms 71.2 
Mean in pounds 190 
Maximum in pounds 230 
Minimum in pounds 157 
Mean ultimate tensile strength per unit area (dry): 
Kilograms per square centimeter 154 
Pounds per square inch : 2,200 
Mean ultimate tensile strength per unit area (wet) : 
Kilograms per square centimeter 222 
Pounds per square inch 3,160 
Mean elongation at instant of rupture: 
Dry (per cent) 11 
Wet (per cent) 18 
Mean weight per unit length: 
Grams per meter 37.3 
Pounds per foot 0.0251 
Average breaking length: 
Meters 1,600 
Feet 5,260 
Moisture (per cent) 9.71 
