Old Sulphur Well, Harrogate. 



57 



obtained by the method of ebullition, although the ratios of 

 the amounts of the gases agree closely with the observations 

 of Hofmann and Muspratt (see Table), which seems to afford 

 proof of the retentive action exerted by the dissolved saline 

 matter. 



The following Table exhibits the results in grains per gallon 

 of the principal analyses which have been made of the water 

 of the Old Sulphur Well. It has been arranged to show the 

 various constituents independently of the views entertained by 

 the analysts as to the particular manner of their combination 

 in the water. We are thus enabled to trace, with a certain 

 degree of probability, the nature of the changes which the 

 spring has experienced from time to time. 





Walker. 

 1873. 



West. 

 1823. 



Hunter. 

 1830. 



Hofmann 

 1853. 



Muspratt 

 1867. 



Davis. 

 1872. 



Thorpe. 

 1875. 









48° F. 



1013-24 





48°- 2 F. 

 1011-13 





48°- 9 F. 

 101116 



48°-2F. 

 1011-04 







Lime 



Magnesia 



1111-2 



398 

 14 7 



484-0 

 6239 



absent 

 1024-8 



36-4 



43-5 

 180 



471-0 

 6080 



absent 

 10160 



34-0 



48-243 

 23-446 



33-869 



474-054 



650-384 

 trace 

 trace 

 6-353 



6*241 

 0101 



1095-919 



531 

 2203 

 3609 



46-233 

 27-392 

 3-68 

 trace 

 44165 



470-635 



654-908 



trace 



trace 



6737 



absent 



1108-781 



7-01 

 25-55 



615-62 

 6 V 412 



1046-56 



38-697 



23-839 



4-833 



0-266 



6063 



0-328 



477-022 



613770 



1-985 



0103 



6-532 



35-404 



0-703 



absent 



1047013 



10-16 

 4010 





Potash 



Ammonia 





Bromine 





Carbon dioxide 

 Silica 



Sulphuric acid . 

 Residue on \ 



eyaporation J 

 FreeH 2 S 



„ co 2 



Total in cub. in. 



Although it is undoubtedly clear that the general composi- 

 tion of the water has experienced no very material alteration 

 during the past 100 years, it would seem to be equally certain, 

 even after making every allowance for experimental error and im- 

 perfection in analytical methods, that certain well-marked 

 changes have occurred during that time. It would appear that 

 the amount of soluble matter in the water suffered a gradual de- 

 crease from 1783 to 1830 ; afterwards it increased until 1867, 

 since which time it has again become less. The close agree- 

 ment between the numbers given by Mr. Davis and those 

 afforded by the analysis of the water collected in August last, 

 clearly shows that it has experienced very little change during 



