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ORIGIN AlfD DEVELOPMENT OF ORE-DEPOSITS. 



I must now proceed to shew how the mineral and thermal 

 springs of the West of England are connected with its ore- 

 deposits, and in doing this I must still largely rely upon the 

 work of Mr. Phillips. In the following table, which is based 

 upon one which Mr. H. Tilly presented to the Miners Associa- 

 tion in 1872, with subsequent additions, I have brought together 

 such particulars of the Thermal and Phreatic springs occurring 

 in the mines of Cornwall as I have been able to gather. 



