ON THE MECHANICAL PROPERTIES OF STEEL. 



173 



TRANSVEESE STRAIN. 



Exp. VITI. — Bar of Steel from Messrs. John Brown &, Co., Sheffield. Di- 

 mension of bar -986 inch square. Length between supports 4 feet 

 6 inches. Mark on bar, " B 8.", 



Besults of E,vp. YIII. 



Here the weight (w) at the limit of elasticity is 860 lbs., and the cor- 

 responding deflection {S) is 1-210. 



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

 and section (D,) = -0012863. 



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

 = 29,335,000. 



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

 pressure = 30,686,000. 



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

 = 43-358. 



By formula (9). — Work of deflection («) for unity of section = 44-598. 



By formula (12).— Yalue of C, the unit of working strength = 5-394 

 tons. 



