610 Philippine Journal of Science 1919 
Taste XXII—Physical tests of rope made from the bast of Urena 
lobata—Continued. 
Mean ultimate tensile strength per unit area (dry): 
Kilograms per square centimeter A482 
Pounds per square inch 6,850 
Mean ultimate tensile strength per unit area (wet): 
Kilograms per square centimeter 366 
Pounds per square inch 5,200 
Mean elongation at instant of rupture: 
Dry (per cent) 8 
Wet (per cent) 11 
Mean weight per unit length: 
Grams per meter 23.7 
Pounds per foot 0.0159 
Average breaking length: 
Meters 6,180 
Feet 20,300 
Moisture (per cent) 9.78 
TILIACEAE 
COLUMBIA BLANCO! Rolfe. Anilau. 
Local names: Aniléu, mamadling, mamauéd (Rizal); keddéng (Llocano, 
Benguet). 
A small tree, attaining a height of about 10 meters, with 
oblong-ovate, acuminate, toothed, hairy leaves, 10 to 20 centi- 
meters long, their bases obliquely cordate; panicles terminal, 
many-flowered, flowers usually pink; capsules about 1 centi- 
meter long, 3- or 4-winged, obovoid; throughout the Philippines 
at low and medium altitudes; common. 
Columbia blancoi bast strips are salmon buff; they average 
0.65 millimeter thick and vary from 2 to 13 millimeters in width. 
The strands average nine strips thick. 
Dry rope made of this bast gives a very low tensile strength 
and breaking length. Wetting the rope increases the mean 
tensile strength about 1 per cent and also gives more concordant 
results. The maximum variation from the mean tensile strength 
in five tests of the dry rope was 16 per cent, while that shown 
by the five tests of wet specimens was 10 per cent. The inhab- 
itants of Disdis, Benguet, who made the rope state that it is 
preferably used during wet weather on account of its durability 
when wetted. Two of the dry, and two of the wet, specimens 
broke in eye-splices. 
A summary of the tests of this species made in the Bureau 
of Science is given in Table XXIII. 
