110 REPORT — 1844. 



The spring which approximates most closely in composition to the Old Well is 

 Thackwray's, contaiuinc 



Chloride of sodium 802' 



Chloride of calcium 77'5 



Chloride of magnesium 38-5 



Carbonate of soda 32* 



Total number of grains 950- 



Sulphuretted hydrogen ... 21-6 



Carbonic acid 4'32 



Carburetted hydrogen 5-76 



Nitrogen 4-32 



Total number of cubic inches 36- 



Repeated trials at intervals of several years, sometimes in the way of complete 

 analyses, sometimes directed to those points alone, confirm the general facts of this 

 water remaining almost uniform in composition, but with less salt and more sulphu- 

 retted hydrogen than the Old Well. Several springs in the same grounds approach 

 to, but none reach this, the earliest of Thackwray's springs. 



The wells on the Common, near the Bog, are too shallow, too unprotected, and even 

 too shifting in their situation to preserve similar uniformity, but I think enough may 

 be discovered from their analysis to disprove the popular opinion that " the moss is the 

 mother of the waters ;" the strongest of these springs yielded — 

 Chloride of sodium 329' 



Sulphate of soda 6"0 



Chloride of calcium 27*8 



Chloride of magnesium 1 7*6 



Carbonate of soda 3*2 



Total number of grains 384- 



And of gases, — 



Sulphuretted hydrogen 4*5 



Carbonic acid 5'4 



Nitrogen 81 



Total number of cubic inches 1 8' 



Several of the minor sulphuretted springs are similar in composition to this, in- 

 cluding Starbeck and Bilton Park. 



Though the sulphuretted springs form the great attraction of Harrowgate, the chaly- 

 beates are numerous, and would of themselves supply a watering place ; the Old Spa 

 contains 10 grains of solid matter, of which 2"5 is oxide of iron, held in solution by 

 carbonic acid, the remainder various earthy salts. Other springs yield 1-8, 2, 1, and •75 

 oxide of iron, with similar quantities of earthy or saline matter. 



Oddy's saline chalybeate, if it remains constant, may well form a distinct class; I 

 found it in 1830 to contain — 



Oxide of iron 5-3 



Chloride of sodium 577"2 



Chloride of calcium 43*5 



Chloride of magnesium... 10- Total... 636 grains. 



In the water of a celebrated spring, the Dropping Well at Knaresborough, I found — 



Carbonate of lime 23 



Sulphate of lime 132 



Sulphate of magnesia 11 



Carbonate of soda 6 Total... 172 grains. 



A trace of iron. 

 If we suppose, contrary to Dr. Murray's hypothesis, all the lime, or a proportionate 

 part of the magnesia, to exist as carbonate, the carbonate of soda will be replaced by 

 sulphate, and this takes place on the deposit of the tufa or petrifactions ; but it is 

 worthy of notice, that, independent of the oxide of iron, to which these owe their 

 colour, the concretions are not pure carbonate of lime, but contains both sulphuric 

 acid and magnesia. 



About two miles to the westward of Harrowgate we again meet with the sodiac 

 water to which I have had so frequent occasion to refer, but less pure than in some 

 other situations ; three wells at Harlow Carr yielded— 



Chloride of calcium 4-73 8-85 4-77 



Sulphate of magnesia 1"15 2-91 1-56 



Carbonate of magnesia 6-93 8-48 8-23 



Carbonate of lime 5*88 "12 ic84 



Carbonate of soda Mil 1764 12-9 



Total... 328 38- 33-3 



