Viscosity encountered on passing from Fluid to Solid. 353 



Fig. 3.— The Absolute Viscosity of Hard Steel (Tables IV., VI.) and of Soft 

 Steel (Tables V., VIL), considered in its variation with the time 

 elapsing after twisting. 



6000 



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1000 iSOOO 3000 1000 JNJU0 8000 



