58 



EEY. J. MILNE CURRAN. 



The specific gravity of the more compact variety of the, tufa is 

 2 '58, the specific gravity of an average sample of Silurian lime- 

 stone being 2-6 — 2*8. 



I have made enquiries from many who have used this water as 

 to its effects. It is generally agreed that it promotes the appetite 

 and assists digestion. This I give as a matter of opinion. Exact 

 knowledge on this head must be left to others skilled in the 

 medicinal value of mineral waters. I may add too, that many 

 who feel the loss of calcium and magnesium salts in Sydney water, 

 are agreed that as an aerated table water the Bungonia spring is 

 excellent. 



For convenience in comparing with the well known Cooma 

 water the following table is added : — 





Bungonia Spring. 



Cooma Soda Spring 



Grs. per Gall. 



Grs . per Gall. 



Calcium carbonate... 



61-10 



40-10 



Magnesium carbonate 



10-84 



22-35 



Ferrous carbonate... 



•30 



1-40 



Calcium sulphate ... 



1 97 





Sodium chloride 



9-69 



3-98 



Sodium carbonate ... 



•81 



42-95 



Potassium carbonate 



6-26 



3-50 



Lithium carbonate 





•21 



Silica 



1-47 



1-03 



Combined water ... 



10-75 





Organic matter and water... 





13-40 



Total solids 



103-19 



128-92 



Since writing the above I find that the Bungonia water is sell- 

 ing in Sydney as an aerated table water, but modified in the 

 relative quantity of its solid constituents. The commercial article 

 contains approximately : 



Calcium carbonate 30 grains per gallon. 



Magnesia carbonate 10 ,, ,, 



Sodium carbonate 20 ,, ,, 



Sodium chloride 5 ,, ,, 



* Dixon, Ann. Eeport Dept. Mines, N.S.W., 1879, p. 48. 



