Northumberland and Durham. 5/> 



and other springs in that neighbourhood, which was addressed in a 

 letter to the Bishop of Carlisle, and inserted in the Philosophical 

 Transactions. The spring continues to flow from the crevices of a 

 basaltic vein for the space of 50 yards in length by 10 in breadth, 

 and in summer, when the water is low, tinges the rocks red, and 

 deposits a crust of salt upon them. The brine of this spring contains 

 carbonate of iron, muriate of soda, and sulphate and carbonate of 

 lime ; but as it becomes mixed with the fresh water in issuing from 

 the rock, the proportions of the mineral ingredients have not been 

 well ascertained. 



Within the distance of 200 yards from this spring two others of 

 very different natures rise from bore-holes in the coal-measures. 

 These are situated in a small dell, and according to Mr. Todd were 

 discovered at the depth of 124 fathoms. 



The spring furthest from the river is called the sweet well, and 

 contains according to Dr. Clanny a small quantity of lime held in 

 solution by carbonic acid. Half way between the sweet well and 

 the Wear a sulphureous spring issues, and from the following 

 analysis by Dr. Clanny, it will probably be found to possess valuable 

 medicinal properties. 



Contents in a wine-gallon of water. 



Muriate of lime . . grains 5 

 Muriate of soda .... 56. 5 

 Muriate of magnesia ... 4. 5 

 Carbonate of lime .... 8. 5 

 Sulphate of lime . ... 3. 5 



78 

 Gaseous Contents. 

 Carbonic acid gas . Cub. In. 8 



Azotic gas 3 



Sulphuretted hydrogene . .11.5 



22. 5 



