n 



«3 3 <J 



8 •= Q 



lil 



'^ S 3 



Ni 



§ = '^ 

 o o ■« 



cr >, r» 



5-a »> 



2 3 3 



3 C P 

 f» n "XT 



s§ i- 



a a-E. 

 a 1= f: 



'c«i^ 



a,» 



f! r.- 3 





p 5 =-5 



O S o '^^ 



S 3 



5 " ' 5. 3 

 V E:2 C 



No. 10163 {iKujc 507). 

 An early and important work on magnetism. 



o - > 





<i n T-, 



^° B ^ 



33 3 m 



%l\ ^ 



Hi 5 



3 "3- = 



gal. 





