ANALYSES MINERAL WATERS. 277 



Owing to ray being somewhat pressed for time, this analysis 

 is not as accurate as I could wish. I am afraid the Calcium 

 is too high and the Magnesium too low. 



At present this substance is only used as a manure in the 

 district in which it is found, but, as might be inferred from 

 the almost complete absence of ammonia, with greatly 

 varying success. 



It has been tried for making cupels for silver assay in the 

 Chemical Laboratory of the Melbourne University with 

 very satisfactory results, the cupels having even a better 

 surface than those made from the artificial material, hence 

 the name given in the heading. This, together with its 

 being sold for thirty shillings per ton at the cave's mouth, 

 should recommend it to those who have much assaying to do. 



I am told that similar deposits occur in various caves in 

 the Western District of Victoria, but I have not seen any 

 specimens myself. 



10.— ANALYSES AND NOTES ON SOME OF THE 

 MINERAL WATERS OF NEW SOUTH WALES. 



By JOHN C. N. MINGAYE, F.C.S., M.A.I.M.E., Analyst to the Depart- 

 ment of Mines, Sydney. 



I. Water from a bore at Ballinore, Falbragar River, near 

 Dubbo, N.S.W. 



Grains per gallon. In 1000 parts. 



Bicarbonate of Sodium 183-10 2-6157 



„ Potassium 12-83 -1833 



„ Lithium -05 -0007 



„ Calcium 11-38 -1625 



„ Magnesium 9-36 -1337 



„ Strontium trace trace 



„ Iron -70 -0100 



Chloride of Sodium 6-92 -0988 



Alumina trace trace 



Silica -28 -0040 



Total fixed matter 224-62 3-2087 



Free Ammonia 0-052 parts per 100,000 



Organic, or Albumenoid Ammonia -003 ,, „ 



Specific Gravity of Water at 65° F. = 1-00359 

 Trace of Phosphoric Acid present. 



Remarks : — This water had a pleasant taste, and is highly chargad 

 with Carbonic Acid. The sample was struck while boring for coal, the 



