5BR£portBritAssocl881 . 



COMPARISON OF MAGNETIC ELEMENTS. 



March 26*^ . 1879. piafce IX. 



iS7 PeJ/T.sbura DetJjnalion 



Lisborc DecljiMCLtwrv 



Heh' - DecLLncuiiort 



Viprmjcu-Declin-oution/ r:^ 



Melhonme'-Del "' 



MeUwu-me^ Hoi •. F. 



Keyt Hor.F. 



Vutrincu Hor . F. 



S*.'Pet£rsbiirg-Hor. F. 



Lisbon Hor. F. 



Lishon-Vert . F. 



p.m. 



Hhisbrating PrcihsdrW. Orylls Adams's 

 Faper on Macfn£tic. I>istxirbanc£S, 



