ON THE MECHANICAL PROPERTIES OF STEEL. 



Ill 



TEANSTEESE STEAIN. 



Exp. v. — Bar of Steel from the Barrow Haematite Steel Company. Dimen- 

 sion of bar 1-032 inch square. Length between supports 4 feet 

 6 inches. Mark on bar, " H2 + ." 



Results of Exp, V. 



Here the weight {iv) at the limit of elasticity is 716 lbs., and the corre- 

 sponding deflection {h) is -968. 



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

 and section (Dj) = -001384. 



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

 = 28,440,000. 



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

 pressure =28,610,000. 



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

 = 28-28. 



By formula (9). — Work of deflection {u) for unity of section = 25-95. 



By formula (12). — Yalue of C, the unit of working strength = 3-938 tons. 



