IMPROVED COTTON AIRPLANE FABRIC. 
43 
10 20 
Fig. 20. — Elasticity 
90 
* 
curves showing the effect of different amounts or dope upon 
plain-weave cloth made from 3/80's mercerized yarn spun from American 
Egyptian cotton of grade No. 1 (fancy), 1| inches in length of staple. 
Twist per inch of single yarn, 35.6. 
Twist per inch of ply yarn, 20.6. 
Construction of cloth, 68 ends by 68 picks. 
Strength of caustic, 64 degrees Twaddle. 
