Wells on the Soils of the Scioto Valley, Ohio. 327 
Constituents soluble in dilute Acid. 
Tron, Alumina, with traces of Manganese, == 2.760 
Organic matter combined with the above bases, == 0.860 ' 
Silica, = 0.560 
Lime, 0.390 
Magnesia, == 0.280 
Alkalies, = 0.161 
Phosphoric acid, traces, 
Total per centage of constituents soluble in dilute acid, = 5.011 
— matter — — by um — 3.140 
re matter remaining in RS pag with the final residue, 
and determined by ignition, ei 
Insoluble silicates, — 83.010 
This insoluble residue, by washing wx ee gave 
59 parts silicious and 41 parts clayey m 
Whole amount of organic matter Fleet by acids and 
alkalies, == 6.750 
Total per centage of the analysis, — 97.637 
The third analysis which I submit is that of the subsoil 
underlying the fertile Ree Ree Bottom. This Bottom, at 
the first settlement of the country, was prairie. ‘The soil in 
question was of an exceedingly coarse variety, and in color, 
light yellow, or buff. Chemical analysis gave for its con- 
stituents as follows: — 
Water, hydroscopic and combined, m vs 
No appreciable quantity of waxy or resinous matter 
extracted by either alcohol or ether. 
Constituents soluble in Water. 
Chloride of Potassium, = .007 
Organic matter s= .0055 
Silica and Lime traces, 
water extract, = 00.057 
Per centage on the whole amount, 
