THE 



BOUTH AFRICAN JOURNAL 

 OF SOIENGE: 



«<JJ * "* 



BEING THE ORGAN OF THE 



<h . 



SOUTH AFRICAN ASSOCIATION 



FOR THE 



ADVANCEMENT OF SCIENCE. 



Issued Monthly. 



/OL IX. JUNE, 1913. NO. II. 



CAPE TOWN. 



PUBLISHED BY THE ASSOCIATION. 



1913 [Price 2s. 



