ON THE MECHANICAL PROPEKTIES OF STEEL. 



217 



TKANSVEESE STEAIN. 



Exp. LII. — Bar of Steel from the Barrow Hfcmalite Co., Furncss. Dimen- 

 sion of bar 1-01 inch square. Length between supports 4 feet 

 6 inches. Mark on bar, " H 3." 



Results of Exp. LII. 



Here the weight {w) at the limit of elasticity is 610 lbs., and the corre- 

 sponding deflection ((<) is •793. 



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

 and section (D,) = -001319. 



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

 =29,717,000. 



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

 pressure =32,71 7,000. 



By formula (8). — ^Work' of deflection (F) iip to the Umit of elasticity 

 =20-155. 



By formula (9). — Work of deflection {u) for unity of section= 19-757. 



By formula (12). — Value of C, the unit of working strength=3-540 tons. 



