ABSTRACT OF PROCEEDINGS. xlix. 



Queensland, the Bassian Islands, Victoria and the South 

 Coast of New South Wales, were made by Messrs. Dun, 

 Halligan, Waterliouse, Browne, Dr, Walkom and Judge 

 Docker. Prof. Cotton having replied to some criticisms 

 of his views, the Chairman in summing up expressed the 

 opinion that the evidence pointed to a eustatic negative 

 movement of the strand-line having occurred around Aus- 

 tralia, but modified in places by actual movements of the 

 land. 



It was decided that future meetings should be held on 

 the third Monday of the month. 



Monthly Meeting, 16th May, 1921. 



Professor Sir Edgewortli David in the Chair. 



Thirteen members and nine visitors were present. 



In view of the Chairman's projected geological tour of 

 the other States, Mr. E. C. Andrews was elected to fill the 

 chair in Professor David's absence. 



exhibits : 



1. By Mr. Varney Parkes : A collection of original 

 drawings of Permo-Oarboniferous fossils, also a number of 

 marine Permo-Carboniferous fossils showing interesting 

 and unusual features. 



2. From the Mining Museum : A number of specimens 

 from various parts of the State, illustrating the occurrence 

 and associations of tin, wolfram and other minerals. 



paper : 

 The abstract, by Mr. Waterliouse, of Dr. Morrow Camp- 

 bell's paper on the origin of primary ore deposits was in 

 Mr. Waterhouse's absence delivered by the Hon. Secretary. 

 According to Dr. Campbell, tin, wolfram, bismuth, etc. 

 are not really products of pneumatolysis, but have been 

 deposited from solution, the medium being silicic acid. 



V— December 7, 1921. 



