ON THE MECHANICAL PROPERTIES OF STEEL. 



167 



TBANSTEESE STEAIN. 



Exp, II. — Bar of Steel from Messrs. John Brown & Co., Sheffield. Dimen- 

 sion of bar -97 inch square. Length between supports 4 feet 

 6 inches. Mark on bar, " B 2." 



Besults of Exp. II. 



Here the weight {tv) corresponding to the limit of elasticity is 960 lbs., 

 and the corresponding deflection (o) 1^482. 



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

 and section (D^) = -0013377. 



By formula (7). — The mean value of the modulus of elaij-cicity (E) 

 = 29,415,000. 



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

 pressure = 29,465,000. 



By formula (S). — Work of deflection (U) up to the limit of elasticity 

 = 59-280. 



By formula (9). — Work of deflection {u) for unity of section = 63-003. 



By formula (12). — Value of C, the unit of working strength = 6-326 

 tons. 



