P1.ATE n . 



Sdinrney^Phi'.Jcur.ynllOIlf 



Fi^A 



I 



I 



Tray of Magnets . 



ny.3. 



First-Distance one Foot. 



S' 



■2 wl 



I 



Ficf.4: 



Fiy. 





Fiq.J. 



Fi^.6. 



a 



FoUofthe Afaffnets. 



/.'. S.\7rf shy del. 



