220 



ABSTRACT OF PROCEEDINGS 



OF THE 



Royal Society of South Australia 



(Incorporated) 



FOR 1910-11. 



Ordinary Meeting, November 1, 1910. 



Mr. Mayo in the chair. 



Election. — Professor Bragg was elected an Honorary 

 Fellow of the Society. 



Mr. Ashby drew attention to the recent destruction of 

 kangaroos on Kangaroo Island and moved that a deputation 

 of members of the Society wait on the Commissioner of Crown 

 Lands in connection with the matter. Resolved "That the 

 President, Secretary, Mr. Ashby, and Mr. Howchin form the 

 deputation, with power to add to their number." 



Exhibits. — Mr. Ashby exhibited birds from the Dande- 

 nong Ranges, Victoria; Mr. Tepper, insects; and Dr. Pul- 

 leine, trapdoor spiders from Burnett River, Queensland. 



Papers. — "On Tetrahedrite from Glen Osmond Quarry," 

 "Further Notes on Radio- Active Minerals from Olary," "On 

 Obsidianites," and "Mineralogical Notes on Sphene, Pegma- 

 tite, Cordierite, Sillimanite, Beryl, and Semi -artificial 

 Gypsum Twin Crystals from a Steam-boiler at Block 14 MinCj 

 Broken Hill, New South Wales," by Douglas Mawson, D.Sc. 



Ordinary Meeting, April 4, 1911. 



The President (J. C. Verco, M.D., F.R.C.S.) in the 

 chair. 



Exhibits. — Mr. E. V. Clark, B.Sc, exhibited silicified 

 wood from Scone, New South Wales, where it is abundantly 

 scattered about the country. In the opinion of several Fellows 

 the wood belonged to a species of pine allied to Araucaria, as 

 the structure of the wood and annual rings were easily re- 

 cognizable. Mr. Clark also exhibited native sulphur from 

 Mount Wingen, near Scone, where a gradually moving area 

 of subterranean combustion is seen on the hillside, probably 

 caused by combustion of the deposits of pyrites. Mr. How- 

 chin described the spontaneous combustion of pyrites which 

 took place in the waste coal heaps in England. Dr. E. A. 

 Johnson exhibited specimens of Trichina spiralis in muscle. 



