ORIGIN AND FORMATION OF SOILS^ 120 



acid under a pressure of atmospheres, and obtained a 

 solution of -winch a pound* contained: 



Carbonate of soda, 22.0 grains. 



Cliloride of sodium, 3.0 " 



Sulphate i.f potash, 1.7 " 



" " soda, 4.8 " 



Carbonate of lime, 4.5 " 



" " magnesia, 1.1 " 



Silica, 0.5 " 



Phosohoric acid and manjranese, traces 



Total, oT.l gi'ains. 



In various natural springs, water comes to the surface 

 so charged with carbonic acid that the latter escapes 

 copiously in bubbles. Such waters dissolve laige quantities 

 of mineral matters from the rocks through which they 

 emerge. Examples are seen in the springs at Saratoga, 

 N. Y. According to Prof Chandler, the '' Saratoga 

 Spring," whose waters issue directly from the rock, con- 

 tains in one sjallon of 231 cubic inches : 



Solid matters, 552.799 " 



Carbonic acid gas, (407.647 cubic inches at 52° Fah.) 

 Water, 58,317.110 



The waters of ordinary springs and rivers, as Avell as 

 those tliat fall upon the earth's surface as rain, are, indeed, 



I'he Saxon pound contains 7,080 Saxc 



6* 



