ABSTKAtT OF TKOCKEDINOS. H, 



Officers. 



The Honorary Secretary reported that the Council at 

 its last meeting had made the following elections and 

 appointments for the current year: — Dr. G H. Butler to 

 be Chairman of the Council ; Mr. E. L. Piesse to be Hon- 

 orary Secretary ; Mr. Leonard Rodway to be Honorary 

 Treasurer; Drs. G. H. Butler. A. H. Clarke, and Fritz: 

 Noetling, Professor T. Thomson Flynn, Messrs. E. L. 

 Piesse and Leonard Rodway to be Trustees of the Tas- 

 manian Museum and Botanical Gardens. 



Papers. 



The following papers were read: — 



■Quaternions Applied . to Phvsics in Non-Euclidean 

 Space. I.: the Mathematical Methods." By Professor 

 Alexander McAvilay, M.A., Professor of Mathematics in 

 the University of Tasmania. 



"Notes on Some Tasmanian Eucalypts." bv Mr. J. H. 

 Maiden, F.L.S., Government Botanist of New South 

 Wales and Director of the Botanic Gardens, Sydney. 



"Additional Note on Stones used bv the Aborigines." 

 By Mr. H. Stuart Dove. 



In 1910 (these P(tjM'r.'< an,/ Proreei] ,n (/■■<, 1910, pp. 26'2- 

 264) Mr. Dove described twoi types of "hammer" or 

 "pounding" stones, of which he had found specimens in 

 coastal sand dunes, and inland on the River Mersey, on 

 the North-West Coast of Tasmania. He now describes two 

 specimens found much further inland, near the waters of 

 the Upper Forth River. The dimensions and weights of 

 these flat, roughly circular, stones are: — (i.) 4|^ inches 

 diameter; thickness at edge, from 1 inch to \ inch ; weight, 

 about LUb. ; (ii.) 4| x 4J inches diameter; thickness at 

 edge, 1 inch to '}. inch; weight, about l^lb- Eacn has one 

 side practically flat, and the other slightly convex ; in each 

 one side is smooth, the other rough; in one the smooth 

 side is the flat, in the other the convex, side. Both are 

 of diabase. In both the edges have been chipped, but in 

 each about 1 inch at the thinnest j)art of the circumfer- 

 ence has been left in its natural state; a similar feature 

 was noted in the stones previously described. Mr. Dove 

 points out that the chipping of the edges would be of little 

 advantage if the stones were used for pounding, and sug- 

 gests that the chipping was intended to give the stones a 

 better shape for the liand. so that they might be used as. 

 missiles. 



