IMPROVED COTTON AIRPLANE FABRIC. 
25 
m 
Fig. 7. — Elasticity curves reproduced from those made by the automatic recording 
device of the cloth-testing machine during the testing of plain-weave cloth made 
from 2/60's yarns mercerized under tension. Yarn spun from Sea Island cotton 
of grade represented by a mixture of one bale No. 1, two bales No. 2, and two 
bales of No. 3, all of 1& inches in length of staple. 
Twist per inch of single yarn, 30.5. 
Twist per inch of ply yarn, 21.5. 
Construction of cloth, 80 ends by 80 picks. 
Strength of caustic, 64 degrees Twaddle. 
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