On Gypsum. 315 



cal Journal, Vol. I. that gypsum is found upon one of 

 the head ^vaters of the Staunton about 25 miles from 

 Fincastle^ in Virginia: on the 9 mile creek, or outlet of 

 the Oxvasco lake. Also at the falls of the Genesee river ; 

 and at the falls of Amgara on the Canada side. 



According to Dr. Mitchell, it is found at St. Mary^s 

 between the Patuxent and Potomac in Maryland and 

 in the town of Marcelhts, in Nexv York, Fibrous gyp^ 

 su?n is found in great quantities near Lexington in Xe?!- 

 tucky. Whether this substance has, in any successful 

 experiments, been applied in agriculture, or to what 

 extent, I am not informed. 



I am. Sir, 



your obedient servant, 



Richard Peters^ 

 April I2th, 1808. 

 Dr. James Mease, 



Secretary Agric, Soc, Philad, 



I have received fine specimens of it from the outlet of the 

 Oxvasco lalve, in the state of New TorL No doubt large 

 quantities of this substance, will be found among the lime 

 stone of our countiy, particularly, perhaps, in the counties of 

 Lancaster and Dauphin in Pennsylvania. And in the great 

 valley of Berkley in Virginia, where, along with the common 

 carbonates of lime, we discover immense quantities of cubic 

 Pyrites-, and Pyrites in other shapes." 



If these actual discoveries, or the conjectures realised, should 

 be productive of x\iQ gypsum proper for agriculture ; the coun- 

 tries distant from the sea board will receive a most valuable 

 accommodation. For us, we must still depend on the present 

 sources of supply. 



