198 



REPORT 1867. 



TEAlSrSVEESE STRAIN. 



Exr. XXXIII. — Bar of Steel from Messrs. Sanderson Brothers, Sheffield. 

 Dimension of bar 1'024 iach square. Length between supports 

 4 feet 6 inches. Mark on bar, " S 3." 



Eesults of Exp. XXXIII. 



Here the weight (w) at the limit of elasticity is 1210 lbs., and the cor- 

 responding deflection (3) is 1-416. 



By formula (6).— The mean value of the deflection for unity of pressure 

 and section (DJ = -0012963. 



By formula (7). — The mean value of the modulus of elasticity (E) 

 =30,368,000. 



By formula (2). — The modulus of elasticity (E) corresponding to 112 lbs. 

 pressure=29,858,000. 



By formula (8). — Work of deflection (U) iip to the limit of elasticity 

 = 71-390. 



By formula (9). — Work of deflection (?<) for unity of section = 68-082. 



By formula (12). — Yalue of C, the unit of working strength =6-780 tons. 



