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An Account of some Experiment with Sulphuret ofBa- 

 rytes as a Manure , by Dr. Isaac Chapman^ of Bucks 

 County. 



Read November 10, 1812. 



Wright St ow7i^ Bucks County, Oct, 20, 1812. 



Respected Friend, 



I send herewith, an account of some experiments 

 I have been making with sulphat of barytes as a ma- 

 nure, which I think are worthy of being published. If 

 thou shalt be of the same opinion, thou may publish 

 them in any way shall be thought most proper. 



I have not found the sulphat of barytes in my neigh- 

 bourhood in sufficient quantities to authorise the ne- 

 cessary works for manufacturing of it, although many 

 tons might be collected, and from the best information 

 I can obtain, it might be manufactured, at about 25 

 cents per bushel ; if the matter is made public, it is 

 not unlikely, considerable bodies of this mineral may 

 be discovered, which I believe would be of incalcula- 

 ble advantage to the agriculture of our country. 



I send by this opportunity a specimen of the sulphat 

 of barytes, and also a specimen of the sulphuret. 



Thy Friend Etc. 



Isaac Chapman. 

 Dr. James Mease. 



