THE MINERAL SPRINGS OF SARATOGA 57 



Dr Charles F. Chandler, adding to them several of later date, in 

 which I have confidence. It has been necessary to reduce grains per 

 gallon, or parts per million, to percentages of evaporated residue. 

 Water must therefore be thrown out, and as compared with analyses 

 previously discussed bicarbonates become normal carbonates. 



Normal calcium carbonate in pure water (that is, containing no 

 free carbonic acid) is stated by F. W. Clarke on the authority of 

 T. Schloesing, to be soluble at i6° C. to the extent of 13 parts in a 

 million (U. S. Geol. Surv. Bui. 330, p. 99, 1908). Calcium bicar- 

 bonate, that is, calcium carbonate in water with enough free car- 

 bonic acid to yield the bicarbonate, is soluble 385 parts in a million 

 at 15° C. (Idem, page 99). Excess of carbonic acid increases the 

 solubility as is shown by the values just cited for the Saratoga 

 waters, which are about ten times that just given for Ca (HC03)2 

 in pure water. On the other hand, sea water is not so good a 

 solvent as pure water, and the Saratoga waters, in so far as they 

 are brines, probably are also less favorable solvents than are pure 

 waters. 



Magnesium carbonate is stated by J. Roth (Allgem. and Chem. 

 Geologic, I, 50. 1879), to be somewhat more soluble in carbonated 

 waters than is calcium carbonate. The presence of calcium car- 

 bonate doubtless exercised some influence since in the Saratoga 

 waters, just as Professor Roth states for waters in general, it is 

 exceptional to find more magnesium carbonate than calcium car- 

 bonate. 





FRANKLIN, 



HATHORN, 



CONGRESS, 



SELTZER, 



HATHORN NO. 



2, GURN, 





BALLSTON 



SARATOGA 



SARATOGA 



SARATOGA 



GEYSERS 



WILTON 



CI 



42.00 



42.40 



42.00 



34-40 



41.20 



28.10 



Br 



.36 



.16 



I. 10 



.20 



.10 



.16 



SO, 



.04 



tr. 



.09 



.13 



.04 





CO3 



15.00 



18.50 



17.50 



25.75 



17.00 



25.30 



Na 



28.8 



27.30 



27.60 



25.50 



30.80 



26.00 



K 



2.0 



.70 



.80 



.40 



.48 



2.33 



Ca 



5-0 



5.70 



6.00 



9.30 



6.22 



11.20 



Mg 



5.0 



4.00 



3.40 



2.80 



3.07 



3-40 



Rest 



1.80 



1.24 



1-51 



1.60 



1.09 



3.51 





100.00 



100.00 



100.00 



100.00 



100.00 



100.00 



Of these analyses the first four are by Doctor Chandler. The fifth 

 is of the recently bored well two miles south of Saratoga Springs 

 and the analysis was made in the laboratory of the State De- 

 partment of Health in 1911. The sixth is from the Lederlc Labora- 



