318 REPORTS ON THE STATE OF SCIENCE, ETC. 
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Lines of principal stress in a tension member due to a lateral 
pinch of intensity equal to one-third of the longitudinal pull. 
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ig 7 Rate rl mpm HANTS 
e Measured stresses 
-<-26 Calculated stresses 
Fia. 5B. 
Comparison of the experimental and theoretical values of the stress 
distribution across the section and along the central line of the test-bar. 
