Natural Hidory Investigations in Floncla Waters. 267 



part of the continent, and reach to that latitude, where glaciers would 

 enter it from the north, and "calve" into icebergs, that would be 

 carried south across the lake by winds and storms, or by the current, 

 when it overflowed the hills of Northern Ohio, Indiana and Illinois. 

 The:?e icebergs would make the scratches', that are found beneath the 

 gravel, and transport the huge I.aurentian rocks and bowlders of 

 Canada, that are found south of the lakes, for a distance of two hnndred 

 miles or more, while such a torrent of water, as would result from an 

 overflow of the lake and the breaking of its barriers, would transport 

 the icebergs, and carry with it the sand and gravel and earth of the 

 higher lands, and distribute them all the way to the Gulf. The 

 different beaches surrounding the lake would represent the height of 

 the water, before each great overflow andMestruction of the barriers, 

 and finally, when the Arctic current ceased to affect the climate, the 

 water from the lakes would again flow in the natural channel to the 

 ocean. 



Such a theory will account for all the phenomena presented by the 

 drift in this locality, and all that I have observed elsewhere, though I 

 have traveled some over Canada and Mississippi and the intervening 

 States. It involves no elevations or depressions of the continent, no 

 changes of climate, beyond what would be inevitable from the change 

 of land and water surface, and the changed course of the Arctic current, 

 and it requires the intervention of no extraordinary or mysterious 

 power. It may not, however, account for everything witnessed by 

 Professor Newberry and others in the neighborhood of the lakes ; but 

 if it fails to give full satisfaction, we may look elsewhere, within the 

 range of probabilities, for the true cause or causes of such anomalous 

 facts, without being driven to seek a solution in the labyrinth of 

 impossiliilities with which the whole glacial theory is charged. 



Natural Hidory Investigations i?i Florida Waters and Among the Keys. 



By W. W. Calkixs. 



" Awake my St. Jobn! i^eave all meaner things, 

 To low ambition and the pride of kings. " 



These lines occurred to me as our little schooner under full canvas, 

 sailed gaily along over the Gulf of Mexico, at the rate of six knots 

 an hour. The day was such as can only be found on these Southern 

 summer seas. The dashing spray and the dancing wave brought to 

 us many a choice specimen of the Fauna and Flora of the Gulf. 



