4G2 



GEOLOGY OF THE DENVER BASIN. 



acid and again evaporated. The residue was dissolved in water, filtered 

 from separated silica, and precipitated with barium acetate. The filtrate 

 containing all the bases as acetates was evaporated to dryness in platinum 

 and ignited strongly. All the bases now remain as carbonates, and it 

 remains only to boil with water to extract the sodium carbonate and filter 

 from the insoluble carbonates of barium, calcium, and magnesium. 



This final filtrate, acidulated with hydrochloric acid, is treated in the 

 usual way. 



Actual results, by separate constituents. 



ANDERSON WELL. 



Solid residue . 



Grains per 

 gallon. 



Calcium sulphate .. 

 Sodium carbonate . . 

 Sodium sulphate .. 

 Magnesium chloride 

 Ferrous carbonate. . 

 Silica 



Lime (CaO) 



Magnesia (MgO) 



Soda (NaaO) 



Ferrous oxide (FeO) . . . 

 Sulphuric oxide (SO3). 



Silica (SiO*) 



Chlorine (CI) 



10.35 

 .36 

 .04 

 5.00 

 .02 

 .76 

 .69 

 .07 



WINDSOR WELL. 



UPPER FLOW. 

 Solid residue 



Calcium sulphate. . . . 

 Sodium carbonate ... 



Sodium sulphate 



Magnesium chloride 

 Ferrous carbonate . . . 

 Silica 



Lime (Cad) 



Magnesia (Mg >) 



Soda (Na.O) 



Ferrous oxide (FeO) .. 

 Sulphuric oxide (SO ) 



Silica (SiO a ) 



Chlorine (CI) 



10.03 



17.85 



17.73 



.62 



.07 



8.57 



.03 



1. 30 



1. is 



.12 



