Be Ls 
540 Prof. Trouton and Mr. Rankine: Stretching and — a 
Fie. 1. 
LEAD WIPE 
+ FIBRE 
FIBRE 
Fig. 2.—Decrease of Couple when kept at Constant Twist. 
* 
(a Or ec 
20 
i 2 Til (x hears) 
