The Strength of Twisted Threads. 
263 
1906-7.] 
curves practically coincide within the limits 3| and 8 turns. These limits 
would include all yarns of commercial value for textile purposes. 
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Fig. 8. 
The author has pleasure in acknowledging his indebtedness to the 
Carnegie Trust for the Universities of Scotland for the financial assistance 
which has enabled him to prosecute this research. 
(. Issued separately October 2, 1907 .) 
