Dr. J. Hopkinson. 



CUBVE 8. 

 25 per cent. Nickel. 



Mfn/Vf. //', / in/ I' nrr-t 



CUEVE 9. 

 Magnetising Force, 6'7. 25 per cent. Nickel. 



CURVE 10. 

 Magnetising Force, 64. 



