THE 



SOUTH AFRICAN JOURNAL 

 OF SCIENCE: 



BEING THE ORGAN OF THE 



JU-! 



SOUTH AFRICAN ASSOCIATION 



FOR THE 



ADVANCEMENT OF SCIENCE. 



Issued Monthly 



VOL. IX. MARCH, 1913. NO. 8. 



CAPE TOWN. 



PUBLISHED BY THE ASSOCIATION. 



1 91 3 [Price 2s. 



