EXPERIMENT STATION. 

 Onondaga Plaster (7 Analyses), 



755 



Gypseous Shale (1 Analysis). 



Calcium sulphate. 

 Calcium carbonate. 

 Magnesium carbonate, 

 Insoluble matter, 



Per coat. 



38.55 



11.05 



2.65 



37.15 



