38 ANNIVERSARY ADDRESS. 



Other Mineral Springs in New South Wales are given, viz— i 

 Ballingore, about eighteen miles from Dubbo, containing chiefly 

 bicarbonates of soda, potash, lime and magnesia. Broken Hill 

 with several weak alkaline sulphated waters charged with sodium- 

 and magnesium-sulphate. 



Mineral Waters found near Nyngan, Rylestone, Wilcannia, 

 Cuttaburra, and Mittagong, are briefly described, which shows 

 sufficiently that a more systematic developement of our mineral 

 and medicinal waters would soon become of great advantage to 

 the Colony at large, and of great benefit to many patients who 

 cannot afford to resort to a voyage to some European spa in 

 search of health. 



Recent Work of the Geological Survey of N.S. W. — An examina- 

 tion of the Clarence coal basin by Mr. C. S. Wilkinson, f.g.s., has 

 led to the important discovery of the existence of the Hawkesbury 

 Sandstone in that area, occupying an intermediate position in 

 the basin, which may be now divided thus: — (a) Upper Clarence 

 Series, Wianamatta Shales; (b) Middle Clarence Series, or Hawkes- 

 bury Sandstone ; (c) Lower Clarence Series, Narrabeen Shales of 

 the Sydney area. Coal seams are developed in the Clarence 

 Series proper, but have not been, so far, profitably worked. 



Further examination of the Permo-Carboniferous Coal-measures 

 in the Newcastle area by Mr. T. W. Edgeworth David, b.a., has 

 resulted in the discovery of volcanic rocks, 1500 feet thick, inter- 

 bedded with the marine strata, which may be the equivalent of 

 the volcanic series of Kiama, and perhaps homotaxial with those 

 of the Bowen River Coal-field in Queensland, and may therefore 

 have considerable classifactory value as regards the co-relation of 

 the East Australian Palaeozoic Coal-fields. 



A sketch survey by Mr. William Anderson, of a portion of 

 the western plains between Byrock and Nevertire, has proved 

 that the Lower Cretaceous rocks, in which supplies of artesian 

 water are likely to be obtained, have a very much greater exten- 

 sion in a southerly direction than was originally supposed, as 



