XIV, 6 
King: Philippine Bast-fiber Ropes 
571 
The results show that in ordinary rope, whether hand- or 
machine-made, the degree of twist is remarkably uniform. In 
a few cases the strand makes one turn in a distance equal to 
the girth of the rope, but as a whole the rope is laid more 
tightly and averages 87 per cent of the girth. 
Testing machine for determining elongation and tensile 
strength. — An automatic, four-screw, universal testing machine 
having a capacity of 30,000 pounds and direct driven by a 1 
horse power electric motor was used for breaking the more 
Table II. — Twist of the ropes tested and the relationship of girth to tivist. 
ROPES MADE OF BAST FIBERS. 
' 
Fiber. 
Girth. 
Length 
of 
twist. 
Twist-^ 
girth. 
mm. 
mm. 
Abroma fastuosa; unrettcd fiber 
36 
29 
0.81 
Abroma fastuosa; retted fiber 
19 
18 
0.95 
Commersonia bartramia 
88 
30 
0.79 
Helicterca hirsuta 
35 
30 
0.86 
Kleinkovia hospita 
39 
32 
0.82 
Pferocymbium tinetoritim 
42 
34 
0. 81 
Pterospermum. diversifolium 
21 
18 
0. 86 
Stereulia crassiramea 
40 
36 
0. 90 
Stercnlla foetida -_Sr 
22 
20 
0.91 
Stereulia ohlojigata 
38 
32 
0. 84 
Stereulia stipulaHs forma 
22 
17 
0. 77 
Bomhycidendron vidalianuni 
22 
19 
0.86 
Malachra fasciata 
17 
16 
0.94 
24 
20 
0.83 
Thespesia lampas - 
80 
27 
0. 90 
Urena lohata var. scahruscula . 
21 
18 
0.86 
Columbia blancoi 
43 
32 
0.74 
Corchorus olitorius - 
22 
22 
1.00 
Grewia eriocarpa 
20 
18 
0.90 
Grewia multijiora 
24 
21 
0. 88 
Grewia hilamellata 
36 
39 
1.08 
Allaeanthus glaher 
39 
30 
0. 77 
Artocarpus communis 
19 
18 
0.96 
Do 
30 
30 
1.00 
Ficus benjamina _ __ 
23 
19 
0.83 
Ficus for stenli 
22 
18 
0. 82 
Ficus pachyphylla : 
22 
18 
0.82 
Ficus palawanensis 
19 
14 
0.74 
Cordia cumingiana 
38 
27 
0.71 
26 
22 
0.88 
18 
18 
1.00 
26 
26 
1.00 
Trema orientalis _ 
26 
21 
0.81 
i Goniothalamus amuyon 
29 
23 
0. 79 
0. 87 
