IMPROVED COTTON AIRPLANE FABRIC. 
37 
1 1 1 
Ho. 1 = Standard specifications 
No. 2 - Special twist mercerized in the yarn 
No. 3 = Special twist mercerized in the piece 
No-, 4 a 'Special twist mercerized in the piece 
with 1/2* starch 
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Loaded to 70$ 
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Loaded to 90$ 
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1.20 
1.10 
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• 90 
.80 
.70 
.60 
■ 50 
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• 30 
.20 
.10 
10 20 30 40 50 10 20 30 40 50 60 10 20 30 '40 50 60 70 lbs 
Fig. 16. — Elasticity curves showing the effect of loading different test samples 
of mercerized cloth by hand to different loads and allowing the cloth to be 
subjected to continual load by disengaging the weight pawl. Plain-weave 
cloth mercerized in the yarn and mercerized in the piece made of 3/80's yarn 
spun from American Egyptian cotton of grade No. 1 (fancy), 11 inches in 
length of staple. „ . , 
Standard Special 
' specifications. twist. 
Twist per inch of single yarn 36-40 33. 80 
Twist per inch of ply yarn 18-20 18. 5 
Construction of cloth, 68 ends by 68 picks. 
Strength of caustic, 64 degrees Twaddle. 
