160 



GEOLOGICAL SURVEY OF THE TERRITORIES. 



Per cent. 



Carbonic acid 11. 80 



Sulpliuric acid 2. 49 



Chlorine 25. 02 



97.64 



The 2.36 per cent, unaccounted for I consider to be principally due 

 to a too low determination of the organic matter, the estimation of 

 which was attended with dif&culties, and the small amount of material 

 at my disposal i)recluding a redetermination. 



The organic matter found in such large quantity was evidently 

 mainly communicated to the water during evaporation, and could 

 scarcely have been contained in the Avater itself. Professor Persifur 

 Erazer, jr., says the spring is not perceptibly ferruginous, so that the 

 iron found was doubtless from the kettle in which the water was evap- 

 orated. The quartz was present in i:)ieces of appreciable size, and must 

 have been mechanically suspended in the effervescing water. The 

 small amount of alumina found may have been in solution in the water, 

 but more probably accompanied the quartz. Eliminating these sub- 

 stances from the analysis, we may exi)ress the composition of the solid 

 ingredients of the water as follows : 



Per cent. 



Chloride of sodium 33. 96 



Chloride of potassium 9. 27 



Carbonate of soda 10. 94 



Sulphate of soda 4. 42 



Silicate of soda 5. 49 



Carbonate of lime 10. 07 



Carbonate of magnesia 5. 40 



Calculating these amounts on the scale of 100 i^arts, and presuming 

 that the soda, in combination with the silicic acid, was originally in 

 combination with carbonic acid, and calculating, moreover, the carbon- 

 ated salts as bicarbonates, we have : 



• Per cent. 



Chloride of sodium / 36.09 



Chloride of potassium 10. 01 



Bicarbonate of soda 24. 01 



Sulphate of soda 4. 78 



Bicarbonate of lime 15. 62 



Bicarbonate of magnesia 8. 89 



100. 00 

 The water of the spring Is thus shown to belong to the class of 

 mineral waters characterized by a preponderance of alkaline chlorides 

 and carbonates. This class of waters has its principal German types in 

 the springs at Ems and Selters in Nassau, analyses of which are 

 appended for comparison. 



Selters Sprinj 



Doctor Spring. 



Clilorido of soclinra 



Chloride of potassium 



Bicarbonate of soda 



Sulphate of soda 



]>icarbonato of lime , 



IJicarbonate of nia<; nesia 

 Bicarbonate of iron 



Per cent. 

 51. G3 I .o 53 



29.29 

 0.7G 

 8.00 

 7. 65 

 0.29 



Fcr cent 

 3G. 69 

 10.01 

 24.01 



4. 78 

 15.02 



8.89 



46.70 



