a 
: 
COPPER-BEARING ROCKS 
OF LAKE SUPERIOR PL. | 
Manitou Light House 
Peay Pore 
Point Abbaye 
sa 
fare Istana Let Fo 
que pers 
por 
Enea [sland Lt 7 
= 
ri 
Detroit Id 
Pilot Light 1 
§O IslandofMackanac 
ackinac 
— 
LAK i SUPERIOR BASIN 
i 
, A-Hoen & Co. Lit Baltimore 
