54 A. W. EUCKER. 



Specimen 9, from Irrawang has a higher susceptibility than 

 any rock described as a basalt in our list of European rocks. It 

 is however less susceptible than several samples of gabbro or 

 olivine gabbro from Skye. 



On a NATURAL MINERAL SPRING at BUNGONIA. 



By Rev. J. Milne Curran. 



[With Plate L] 



[Read before the Royal Society of N. 8. Wales, June 6, 1894.'] 



Mineral springs are so few in this Colony that no apology is 

 needed for bringing forward the following notes. The existence 

 of the Bungonia spring has been known to Mr. James Armstrong 

 and the writer for some few years past, but it is only recently I 

 had an opportunity to revisit and make a detailed examination 

 of the locality. A chemical examination of the water has become 

 almost a necessity in the .public interest. It is now customary for 

 numbers of persons to resort to the spring, and very favourable 

 opinions are generally expressed to the therapeutic properties of 

 the water. 



The spring is situated on the Bungonia Creek, a short distance 

 above Bungonia. The locality is part of a district known to Rev. 

 W. B. Clarke and Dr. A. M. Thompson as Lumley Creek. * 



Near the spring the first feature to attract attention is the 

 presence of beds of fresh-water limestone, as well as the free 

 escape of bubbles of carbonic acid gas from the water. This 

 limestone calls to mind a similar tufa that I saw surrounding the 

 w<-U known mineral spring at Cooma. In both instances the 

 calcareous tufa has been deposited by the mineral water and is 



* Trans. Roy. Soc. N. S. Wales for year 1869, p. 67. 



