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 I1.—Twist of the ropes tested and the relationship of girth to twist. 
ROPES MADE OF BAST FIBERS. 
t 
* Length Twist 
Fiber. Girth. BE B girth. | 
mm. mm. 
Abroma fastuosa; unretted fiber .........----.---------------------- 36 29 0.81 
wbroma fastuosa; retted fiber. <.. 5. oe ese sis een ewen~ 19 18 - 0.95 
Conunerasowin Dartramia <c0 2c oon as oo Sas ee sete 88 30 0.79 
Helicteres hirsuta ....-..- PD Ee mn n eg 35 30 0. 86 
Miptuhaweabiebthic ge ig oer reacts 39{ 32 0.82 
Pterocymbium tinetorium ........---------- ; 42 84 0.81 
Pterospermum diversifolium _....---.----------+-------+----------- 21 18 0. 86 
Sterautic erdseivamen. 5 ee ee i ¢ GOO 40 36 0.90 
Stereiilin Soetida cscs Sik sock ee a ae bans deweies 22 20 0.91 
Steréutia oblongata <isc4 on se ‘ 88 82 0.84 
StereGlia stipules Por a os a ec 22 17 0.77 
Bombycidendron vidalianum -....---- -=--~-------------++---+-=++-- 22 19 0. 86 
ST LON FUORI ok oa a ah kai a sce own See acon ne 17 16 0.94 
TRIN MUR ha te SG a pnw eee wiouen 24 20 0.83 
bg EEE ER IG FM 1 "URS ani Sure ND SG Sn i A AY OEE een PRLS Oe 30 27 0.90 
Urena lobata var. scabruscula ....-...-.---. ---+----.-+.-+-+-+------ 21 18 0. 86 
COND DIAMOOS iis ae i seg acs eke conunecwnke 43 32 0.74 
orchorils CIO‘ ee ce INA sk aa 22 22 1,00 
Grewia eriocarpa ._....-..---------- Bs ok pa ae 20 18 0.90 
Crrawia. wvalteflord acc oe eS e 24 21 0. 88 
Grewia bilamellata ......--.---. aE aE 36 39 1.08 
‘Altnsanthhie clebeh icin asret cece. ssctesey sd eek i eee 
Artocarpus communis P 164i 16s] 0. 
WO fe hae nee : : 80 80 1.00 
Ficus benjamina _...-.-.--------- a Lo ae 19 0.83 
Pets forsingl 22 ee ae 22 18 ; 0.82 
Pics wachpohpla- 2s oe aes 22 18 0. 82 
Ficus palawanensis ......-.-------------------= 19 14 0.74 
Cordia cumingiana _ mae 38 27 0.71 
Cordia myza 25 22 0.88 
Galt 69238. isin ais ik CR WR eee 18 18 1.00 
| Bombaz: ceiba ... eccinesAamngn el 26 26 1.00 
Trema orientalis ....-.---- te acs 26 21 0.81 
Goniothalamus amuyon ...-------------+--- ena 29 | 23 0.79 
© Pevertee ecco eek Sate vateiacs es SHdemaeauccchesiees edao| - 0.87 
