D. A. Wells on the Soils of the Scioto Valley. 13 
Magnesia, : ; ; sera 280 
Phosphoric acid, _. ‘ : «>» | traces. 
Potash and soda, : i . 0-161 
Total acid extract, . : : 3 5-011 
Organic matter rendered soluble by ammonia, 3:140 
“6 6b “ cc ‘c soda, 1-030 
Organic matter remaining in combination with the 
insoluble residue, and determined by ignition, 1-720 
Insoluble silicates, . 83-010 
100 parts of the insoluble residue gave by washing 
and separation 59 parts siliceous, and 41 parts 
clayey matter. 
Total amount of organic matter extracted by alka- 
lies and acids, . ; ; : tes 25), 
Total per-centage of the whole analysis, . ; 97637 
n the separation of the organic constituents of a soil by means 
of alkalies, a slight loss is almost unavoidable, owing to the sepa- 
ration and solution of a part of the alumina and other inorganic 
Substances in combination with the organic matter, forming salts. 
he third analysis which I present, is that of a subsoil, under- 
lying the fertile loam of the Ree Ree Bottoms. This bottom 
was originally prairie, at the first settlement of the country. The 
soil in color is yellow, and in character, coarser than any other 
Variety examined from the Scioto valley. 
Chemical analysis gave as follows: 
Water, hygroscopic and combined, ; . 00-44 
No appreciable matter extracted by either alcohol, or ether. 
Constituents soluble in pure water. 
Alkaline chlorids, . ; ‘ - 0070 
ganic matter, with traces of silica and lime, 0055 
Total water extract, : j ‘ - 0126 
Total per-centage, . 00-057 
Constituents soluble in dilute acid. 
on, alumina and manganese, . ; : 02-000 
tganic matter, combined with the above, . : 00-440 
Silica, . : ; ; . 00-200 
Lime, : : wines i6kE « . 02550 
agnesia, . . ‘ ‘ P ‘ . 01-280 
Phosphoric acid and alkalies, : ‘ ‘ traces. 
Total per-centage of constituents soluble in acid, - 6-470 
Carbonic acid, i ote oD ‘ 02-300 
Organic matter rendered soluble by ammonia, . . 00°42 
if “ ‘“ “c “ soda 
ae : 0 
Organic matter remaining in combination with the insolu- 
ble residue, and determined by ignition, : 
Insoluble silicates, &c., othe : ; . 90270 — 
Total per-centage of the analysis, . : - 100507 
