H. A. Rowland — Studies on Magnetic Distribution. 

 Table XIII. 



.. 



Observed. 



ObSrved. 



Oo-„. 



e™,. 



In 



f- 



'£1 



34-26 

 18-60 



V 



3-84 



^?-2 





4-?7 



+ •8 



6-40 



2-3 



1-8 



1-41 



+ -4 



47r^=-117(10-^o-^(^-10-^'>n 



In equation (7), and also from Green's formula, we have seen 

 that for a given quality and temper of steel -^ is a constant. 

 From Coulomb's experiments on a steel bar -176 inch in diam- 

 eter whose quality and temper is unknown, though it was 





Observed. 



Obse^rved. 



Computed. 



Error. 



5-12 



21-4 



16-7 



16-?2 



^% 



probably hardened, Green has calculated the value of this con- 

 stant and obtained -05482, which was found from the French 

 inch as the unit of length, but which is constant for all systems. 

 From Tables XIII. and XIV. we find the value of r to be 4674, 

 whence ^ = -04440 for steel not hardened. As the steel be- 



and can probably reach 





Soft steel, A. 



Hard steel B. 



X. 



Qe. 



4.A. 



Qf. 1 47rA. 



1-92 



'9-8 



1 



2-6 ^2-0 



•f hardening, I 

 !r, thus producir 



