TRANSACTIONS OF THE SECTIONS. 



109 



Horley Green, one mile and a quarter north-east of Halifax, is the site of a power- 

 ful chalybeate spring ; I found — 



Sulphate of iron 40-77 



Sulphate of lime 15"26 



Sulphate of magnesia 5' 



Chloride of calcium '32 



Silica -93 



Alumina 1-22 Total... 63-5. 



On the south bank of the river Wharfe, at Boston, or Thorp Arch, a strong saline 

 spring supplies hot and cold baths ; its composition I found to be — 



Chloride of sodium 822- 



Chloride of calcium 59* 



Chloride of magnesium 11'5 



Silica 1-25 



Carbonate of iron 1-7.5 Total... 895-5 grains. 



It was natural to expect iodine and bromine in water containing so large a propor- 

 tion of chlorides, but I could not in any state of concentration detect either. This 

 water has been said to contain hydrosulphuric acid, which, as may be supposed from 

 the composition, is a misrepresentation, arising from the wish to bring the baths into 

 closer competition with those of Harrowgate. 



The celebrated Harrowgate springs might of themselves furnish a long dissertation ; 

 I shall make it as short as their number and importance will permit, analyses by 

 others as well as by myself having been published repeatedly within the last few years. 

 The Old Well, which forms the type and standard of all the sulphureous waters of the 

 place, yielded on the last occasion on which I analysed it, — 



Chloride of sodium 872-4 



Chloride of calcium 94-1 



Chloride of magnesium 45*7 



Carbonate of soda 34-8 



Total number of grains 1047* 



Sulphuretted hydrogen ... 15-6 



Carbonic acid 2*72 



Carburetted hydrogen 6-86 



Niti-ogen 8-82 



Total number of cubic inches 34- 



As on former trials, I found no sulphates in the water ; when these have been met 

 ■with, I have no doubt sulphui-ic acid has been formed in the water, from keeping, or 

 from the action of heat during evaporation. I found iodine and bromine distinctly on 

 evaporation, as well as a minute trace of potash. 



Dr. Watson, in his well-known essay, speaks of three other springs as situated close 

 to the Old Well ; these have been long covered in, but the spot was opened in 1 836 ; 

 No. 2 was not, I think, found, but Nos. 3 and 4 then contained — 



Chloride of sodium 852 



Chloride of calcium 83 



Chloride of magnesium 43 



Carbonate of soda 10 



Sulphate of soda 2 



No. 4. 



737 



69 



40 



9 



16 



And of gases, — 



Total number of grains... 990 871 



Sulphuretted hydrogen 7 



Carbonic acid 6 



Other gases, chiefly nitrogen 12 



3 



6 

 14 



23 



Total number of cubic inches 25 



These springs appear, like No. 1 , or the Old Wells, to have increased in strength 

 since the time of the earlier published analysis. I found in 



Dec. 1823 ... 1025 grains of salts. I May 1836 ... 1066 grains of salts. 

 May 1830... 1016 | May 1844... 1047 



