338 Mineral Ma7iures^ and the Value oj 



the acre. The average crop has not sensibly diminished 

 since it was first cleared. The timber-growth originally upon 

 this ground was honey-locust, black-walnut, pawpaw, box- 

 elder, white-ash, elm, mulberry and buckeye. 



The color of this soil, when dry, was dark brown, or black, 

 of an extraordinary degree of fineness. Sample examined, 

 entirely free from stones or pebbles. The character of this 

 soil for the absorption and retention of moisture was carefully 

 noted, but as the results obtained seem to me to have mainly 

 a comparative value, they are here omitted. 



The chemical analysis gave as follows : — 

 Water, hygrometric and combined, .... 03-636 

 Waxy and resinous matters extracted by alcohol, -0030 



" " " " " << ether, -0025 



Total extract, -0055 



Total per centage, 00-0164 



Constituents soluble in pure water : — 

 Extract of earth, alkaline chlorids, with traces 



of lime, -0460 



Organic matter — crenic acid, . . . -0208 



Silica, iron, lime, with traces of sulphuric acid, -0652 



Total water extract, .... "1320 



Total per centage, ....... 00-395 



Constituents soluble in dilute acid : — 



Iron, alumina with traces of manganese, . 01-995 

 Organic matter in combination with the above, 01004 



Silica, 00-640 



Phosphoric acid, ..... 00-041 



Potash and soda, 00-100 



Lime, 01-026 



Magnesia, 00236 



Total per centage of constituents soluble in dilute 



acid, 5-042 



Organic matter rendered soluble by ammonia, . .01-840 



" " «< <' " soda, . '. 04-368 



