1^4 



REPORT 1867. 



TEANSVERSE STRAIN. 



Exp. IX. — Bar of Steel from Messrs. Jolin Brown & Co., Sheilfield. Dimeu- 

 siou of bar 1 inch square. Length, between supports 4 feet 6 inches. 

 Mark on bar, " B 9," 



Results of Ex]^. IX. 



Here the weight (iv) at the Umit of elasticity is 860 lbs., and the corre- 

 sponding deflection {I) is 1^100. 



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

 and section (Dj) = •001258. 



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

 = 31,292,000. 



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

 pressure = 31,833,000. 



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

 = 39^416. 



By formula (9).— Work of deflection 0') for unity of section = 39-416. 



By formula (12). — Yalue of C, the unit of Avorking strength = 5-170 tons. 



