353 



This analysis of the small yellow concretions, from the 

 upper portion of the clays, was made in the State Labora- 

 tory, under the direction of Professor Emmons. 



Water, , 6.28 



Organic matter, 1 .70 



Silica, 30.88 



Free alumina and per oxide of iron, 9.42 



Carbonate of lime, 58 . 98 



Magnesia, 0.22 



Total, 99.42 



