THE 



OUTH AFRICAN JOURNAL 

 OF SCIENCE: 



BEING THE ORGAN OF THE 



SOUTH AFRICAN ASSOCIATION 



FOR THE 



ADVANCEMENT OF SCIENCE. 



1912. 



PORT ELIZABETH. 





Issued Monthly. 



OL. IX. OCTOBER, 1912. NO. 3. 



CAPE TOWN. 



PUBLISHED BY THE ASSOCIATION. 



1 91 2 [Price 2s. 



