JOURNAL 



PROCEEDINGS 



ROYAL SOCIETY 



OF 



NEW SOUTH WALES 



FOR 



1920. 



(INCORPORATED 1881.) 



VOL. LIV. 



EDITED BY 



THE HONORARY SECRETARIES. 



THE AUTHORS OF PAPERS ARE ALONE RESPONSIBLE FOR THE STATEMENTS 

 MADE AND THE OPINIONS EXPRESSED THEREIN. 



SYDNEY 

 PUBLISHED BY THE SOCIETY, 5 ELIZABETH STREET, SYDNEY. 



1920. 



