396 Wells on the Soils of the Scioto Valley, Ohio. 
Organic matter rendered soluble by Ammonia, ac- 
companied with Alumina, and indicating the 
presence of Apocrenic Acid, — 01.840 
o. do. by Soda, — 04.368 
Organie matter remaining in combination with the 
insoluble residue and determined by ignition, — 04.145 
Whole amount of organic matter found in the soil, 
as extracted by water, acid, and alkalies, and 
determined from final residue, = 11.373 
Whole amount as determined by ignition in a new 
portion of soil, = 10.970 
Difference, = 00.403 
Insoluble silicates and earthy residue, = 78.842 
100 parts of the insoluble residue gave by washing 
and separation, 45 parts silicious sand 
55  ** clayey matter. 
Total, 100 
Total per centage upon the whole analysis, = 98.3454 
Another soil examined by me was taken from the Ree Ree 
Bottom, a district embraced in the Scioto Valley. This soil 
has been cultivated fifty-one years; forty-five crops of corn 
and two or three of wheat have been taken off from it; it 
has also been a few years in grass, or clover. It has scarcely 
diminished in fertility, and now with the most ordinary cul- 
ture, yields on an average, one year ‘with another, eighty 
bushels of corn to the acre. 
This soil resembled the preceding in color, and possessed 
like it, a remarkable fineness of its elementary particles. 
Chemical analysis gave as follows : — 
Water, hygrometrie and combined, =: 3.500 
Resinous and waxy matters extracted by alcohol, = .032 
z s "8 c atur, = .004 
Total, = 0.036 
Constituents soluble in pure Water. 
Extract of Earth, Alkaline Chlorides, etc. == .032 
Organic matter, crenie acid, = .010 
Iron, Lime, Silica, ete. = ,012 
Total per centage of the water extract, ie eu DAO 
