340 



BOARD OF AGRICULTURE. 



Gfjpseons Shale (Port Byron, N.Y.). 



(Fioiii Mr. Ellis, Amherst, Maes.) 



Calcium carbonate . 

 Magnesium carbonate 

 Calcium sulj^hata . 

 Iron and alumina . 

 Insoluble matter 



Per ct'tit. 



11.05 



2.65 



38.55 



.60 



37.15 



This material has been sent on for examination, to ascer- 

 tain its commercial value in our market. As its value de- 

 pends largely on the gypsum present, it will be seen that the 

 cost of transportation interferes with its sale at remunerative 

 prices within our State. 



Onondaga Plaster. 



IT. 



(Collected of W. U. Earle, Worcester, Mass.) 



The Onondaga plaster has been sold (at six dollars per 

 ton), during the past year, quite generally throughout the 

 western and central parts of the State. It contains from 

 sixty to sixty-two per cent of sulphate of lime, — about two- 

 thirds of the amoimt in a good Nova-Scotia article, wliich 

 .supplied our entire want in previous years. 



