1889.] 



PCBLIC DOCUMENT — No. 33. 



199 



Onondaga Plaster * (7 Analyses) . 



* Contains 1 sample of Cayuga plaster. 



Gypseous Shale (1 Analysis). 



Per cent. 



Calcium sulphate, 38.55 



Calcium carbonate, 11.05 



Magnesium carbonate, 2.65 



Insoluble matter, 37.15 



Oas-house Lime (4 Analyses) . 



* Sulphuric acid includes all forms of sulphur present. 



