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CORRESPONDENCE. 
On Mr. Fr.ank Lkverett'.s "Correlation ok Mok.vixks with 
Beaches on the Border of Lake Erie." In the March issue of 
this journal Mr. Leverett opens a correspondence on my paper en- 
titled "An account of the- researches relating to the Great lakes". He 
says that "Dr. Spencer has intimated in the February American Geol- 
ogist that these later studies have removed the supposed evidence of 
ice occupancy of the eastern part of the region during the formation 
of beaches in the western part, and that th§y sustain his cherished view 
that the shore lines are marine." He further implies that I do not 
