OP ARTS AND SCIENCES. 



117 



Resistance of the circuit, 2.64 ohms. 



Current in Vebers, before metals were placed in coils . . 23.57 

 after „ „ . . 19.20 



Difference 4.37 



Mechanical equivalent = 5144.2 metre grammes. 



No. of reversals of magnetization per minute .... 5844 



(2) 



Water. 



Cobalt. 



Nickel. 



Resistance of circuit, 2.64 ohms. 



Current in Vebers, before metals were placed in coils . . 24.54 

 „ after „ „ . . 21.34 



Difference 3.20 



Mechanical equivalent = 2758.5 metre grammes. 

 No. of reversals of magnetization per minute 



5904 



(3) 



Water. 



Iron. 



Resistance of circuit, 2.64 ohms. 



Current in Vebers, before metals were placed in coils . . 24.544 

 „ after „ „ . . 21.715 



Difference 28.29 



Mechanical equivalent == 2112. metre grammes. 



No. of reversals of magnetization per minute 5700 



