20 



AGRICULTURAL TEXT-BOOK. 



61. THE ARTESIAN WELL, AT GRENALLE, near Paris, (Pay en,) 

 contains in 100,000 parts: 



Carbonate of Lime, - 6.80 



Carbonate of Magnesia, - - 1.42 



Bicarbonate of Potash, - 2.96 



Sulphate of Potash, - 1.20 



Chloride of Potassium, - 1.09 



Silica, - - 0.57 



Yellow matter, not defined, - - 0.02 



Organic nitrogenous matter, - - 0.24 



14.30 



62. SEVERAL SPRINGS AT HARTFORD, Connecticut, (Bidl) 

 give in 10,000 parts of water: 



63. These examples are sufficient to show how water in 

 the earth is charged with foreign matter, varying constantly, 

 according to circumstances. The absolute quantity of saline 

 matter contained in spring water, has been shown by Grange to 

 be influenced in some cases, (as in the valley of the Isere,) by 

 the relative height of the locality, and increases from the tops 

 of the mountains towards the valleys. The relative quantities 



