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 forstenii. 
[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 132 
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 
