.o' ’’ Journal and Proceedings 
° f 
The Royal Society of 
Western Australia. 
PATRON: HIS MAJESTY THE KING. 
Volume VII. 
1920 - 1921 . 
The Authors of Papers are alone responsible for the statements 
made and the opinions expressed therein. 
PRICE: H'be Shillings , 
IPevtb : 
BY AUTHORITY : FRED. WM. SIMPSON, GOVERNMENT PRINTER. 
035 / 21 . 
1921 . 
