302 



REPORT — 1867. 



TKANSVERSE STRAIN. 



Exp. XXXVII.— Bar of Steel from Messrs. Tui-ton & Sons, Sheffield. Di- 

 mension of bar 1-032 inch square. Length between supports 

 4 feet 6 inches. Mark on bar, " B."' 



Results of Exp. XXXYII. 



Here the ■vreight («') at the limit of elasticity is 1210 lbs., and the corre- 

 sponding deflection {I) is 1-410. 



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

 and section (DJ = -0012958. 



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

 = 30,390,000. 



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

 pressiire = 31,297,000. 



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

 = 71-087. 



By formula (9). — Work of deflection («) for unity of section = 66-748. 



By formula (12). — Value of C, the unit of working strength = 6'625 tons. 



