136 



Dr. S. W. Richardson on the Magnetic 



Curve 



(7). 



H= 



= 0*49. 



Curve 



(8). 



H = 



= 1-96. 



T. 



I 



T. 



B. 



T. 



B. 



T. 



B. 



219 



14 



67-7 



400 



91-0 



15 



367 



585 



172 



230 



759 

 83-3 



426 

 434 



81-5 

 731 



305 



736 



624 



67 



247 



86-3 



443 



67-2 



345 



895 



693 



18 



300 

 315 



92-7 

 960 



462 



469 



610 

 591 



435 



714 



785 



3-4 



365 



101-0 



516 



50-8 



457 



714 



888 



3-4 



390 



98-6 



535 

 544 



48-2 

 43-4 



i 



483 



681 



i 



| 943 



. 3-4 



4000 



3000 



2000 



1000 



Fig. 8. 



_ H= 12-22 









\ 















- ■«*> 











-> 



\ 

















\ X' 







: H = 7-39 



— ■" 









\ /S> ^v 







B 















\ 













li^^ 



\ 



s 



H=4-09 













\ 





H=3-I2 







/ 



^\ 



i 















r 















/* 









\ 



\ , 



H=?ZO 

















H= 1-0 + 











,% ^~~*^ 

















'** 







100 200 300 400 500 600 



