190 



REPORT 1867. 



TEANSTEESE STRAIN, 



Exp. XXV.— Bar of Steel from Mr. S. Osbom, Clyde Works, Sheffield. Di- 

 mension of bar 1-04 inch square in centre. Length between supports 

 4 feet 6 inches. Mark on bar, " 6. Double Shear Steel, 



Eesiilts of Ex2}. XXV. 



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

 responding deflection (S) is 1^012. 



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

 and 'section (DJ = •OOieSSl. 



By foi-mula (7). — The mean value of the modulus of elasticity (E) 

 = 23,319,000. 



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

 pressure = 23,948,000. 



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

 = 31-792. 



By formula (9). — Work of deflection (u) for unity of section = 29-393. 



By formula (12).— Value of C, the unit of working strength = 4-329 tons. 



