THE 



LONDON AND EDINBURGH 



PHILOSOPHICAL MAGAZINE 



AND 



JOURNAL OF SCIENCE. 



[THIRD SERIES.] 



MAY 1835. 



LIII. On Dr. Ure's Paper, in the Philosophical Transactions, 

 on the Moira Brine Spring; and on the Proportion of Bromine 

 in the Waters of different Seas. By Charles Daubeny, 

 M,D., F.R.S., Professor of Chemistry, Oxford. 



To the Editors of the Philosophical Magazine and Journal, 



Gentlemen, 



TN the second part of the Philosophical Transactions for 

 -^ 1834, is a memoir by Dr. Ure, on the Moira brine spring 

 at Ash by-de-la- Zouch*, which he states to contain in the gallon 

 the following saline ingredients : Grs. 



Bromide of sodium and magnesium... 8*000 



Chloride of calcium 851*000 



Chloride of magnesium 16*000 



Chloride of sodium ' 3700*000 



Protoxide of iron a trace 



In all 4-575-000 



As the author has not alluded to the paper published by 

 me in the Transactions for 1830, " On the occurrence of iodine 

 and bromine in certain mineral waters of South Britain," 

 (where he would have found the Ashby waters specified as 

 containing the latter principle,) he does not notice the great 

 discrepancy between the results of his own analysis of this 

 spring, and those of the one I had quoted in my table on the 

 authority of Dr. Thomson of Glasgow. 



[* See Lond. and Edinb. Phil. Mag., present vol., p. 58. — Edit.] 

 Third Series. Vol. 6. No. 35. May 1835. 2 T 



