THE 



SOUTH AFRICAN JOURNAL 

 OF SCIENCE; 



BEING THE ORGAN OF THE 



SOUTH AFRICAN ASSOCIATION. 



FOR THE 



ADVANCEMENT OR SCIENCE 



Issued Monthly. 



VOL. VIII, JANUARY, 1912. NO. 6. 



CAPE TOWN. 



PUBLISHED BY THE ASSOCIATION 



1 91 2 [Price 28, 



