Curves I. 



positive DiscHflRqe 



Phil. Mag. Ser. 6, Vol. 20, PL IV. 



Curves IV. 



JS 



3 



«-»-? 















£ 



3 qo 





\ 







Current 





4. 

 3_ 



200 



1 



r' 





a_ 





/ 















loo 



























'I iz 



3 



'4 



'5 '6 '7 



'y (Cn 



*■) 



fo.n 



E-S. Units 



Curves VII. 



"1 T 1 1 1 



0-1 OX 0'3 0-4- OS" 0-6 07 o-8 0-9 y (Cm.) 



