630 
Philippine Journal of Science 
1019 
Table XXXIII. — Physical tests of rope made from the bast of Ficus 
palawanensis — Continued. 
Mean ultimate tensile strength per unit area (dry) : 
Kilograms per square centimeter 752 
Pounds per square inch 10,700 
Mean ultimate tensile strength per unit area (wet) : 
Kilograms per square centimeter 766 
Pounds per square inch 10,900 
Mean elongation at instant of rupture; 
Dry (per cent) 12 
Wet (per cent) 19 
Mean weight per unit length: 
Grams per meter 24.7 
Pounds per foot 0.0166 
Average breaking length: 
Meters 6,230 
Feet 20,400 
Moisture (per cent) 9.08 
BORAGINACEAE 
CORDtA CUMiNGlANA Vid. Anonang-lalaki. 
Local names: Anonang-lalaki (Mindoro) ; maratarong (Ilocano, Benguet). 
A small tree with broadly ovate, cordate, somewhat hairy 
leaves, many-flowered inflorescences, and small, ovoid, fleshy 
fruits; of local occurrence at low altitudes in Luzon. 
The strips of this bast that constitute the strands of the 
rope procured for testing vary considerably in size and color; 
some strips are 15 millimeters wide and 1 millimeter thick, 
and are stiff and amber brown. Others are only 0.2 millimeter 
thick, 6 millimeters wide, soft, and buff. Plate V, fig. 1, shows 
that most of the Cordia cumingiana bast strips are broad and 
very coarse. The strands average seven strips thick. 
When dry, rope made of this bast is low in tensile strength 
and breaking lenghh. Wetting decreases the mean tensile 
strength of the fiber 6 per cent, but for all practical purposes 
does not affect the mean elongation. All of the wet specimens 
broke in the unspliced portion of the rope, whereas three of 
the five dry specimens ruptured in eye-splices. The latter tests 
showed more discordant results than the former, the maximum 
variations from the mean in the five dry, and the five wet, spec- 
imens being 20 per cent and 13 per cent, respectively. 
A summary of the tests of this species made in the Bureau 
of Science is given in Table XXXIV. 
