IMPROVED COTTON AIRPLANE FABRIC. 
29 
.20 
TENS-ION 
S 
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X 
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•90 
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• 70 
S 
1 w 
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2 w 
X 
.50 
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2 f 
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• 30 
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No. 1 - lbs. tension 
No. 2 - 50 lbs. tension 
No. 3 - 200 lbs. tension 
.10 
/ 
>f 

If// 
a 
- 
Varp 
'"b 
10 
20 
30 
UO 
50 
60 
70 
90 
100 lbs. 
Fig. 10. — Elasticity curves showing the effect of different tensions at which the 
cloth is held during mercerization. Plain-weave cloth made of 3/80's gray 
yarn spun from American Egyptian cotton of grade No. 1 (fancy), 1| inches 
in length of staple. 
Twist per inch of single yarn, 33.8. 
Twist per inch of ply yarn, 18.5. 
Construction of cloth, 68 ends by 68 picks. 
Strength of caustic, 64 degrees Twaddle. 
