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THE FUCOIDS OF THE CINCINNATI GROUP. 

 By Joseph F. James, 



Custodian of the Cincinnati Society of Natural History. 



Read and referred to Publishing Committee, September 2, 1884. 

 The induction philosophy of Lord Bacon is the guiding philosophy of 

 science. This scientific method teaches us to argue from particulars to 

 generals; from the known to the unknown. So that, before attempting to 

 investigate the conditions of the past, something should be known about 

 those of the present. He who would argue about the substance of the 

 moon without knowing something of the composition of the earth, would 

 not deserve the confidence nor merit the hearing of his fellows. So he 

 who would argue about the formation of rocks, without a knowledge of the 

 manner of the deposition of sediment at the present day, should meet a 

 similar fate. 



Tt has been generally acknowledged by geologists, at least by those of 

 the uniformitarian school, that the changes on the earth's surface have been 

 gradual. All the introductions and extinctions of animal forms have come 

 slowly. Rivers have carved their beds, and mountains have been elevated 

 by slight degrees. The majority of changes, however vast, have been pro- 

 duced by such agents as are at present modifying the surface of the earth. 



