REPORTS OF GEOLOGISTS. C1X 



CHEMICAL "WOKK OF THE SURVEY AT THE LABORATORY OF THE AGRICULTURAL AND 



MECHANICAL COLLEGE. 



Mr. P. S. Tilson, during the seven months of his connection with the Sur- 

 vey in 1890, made sixty-nine examinations of soils, clays, and iron ores which 

 were divided as follows: 



SOILS. 



Complete chemical analyses 25 



Mechanical analyses 12 37 



\ 



CLAYS 



Complete analyses 1 1 



IRON ORES. 



Limonites, from Cass County, complete analyses 25 



Limonites, from Cass County, partial analyses 6 31 



Total 69 



