

THE 



50UTH AFRICAN JOURNAL 

 OF SCIENCE: 



BEING THE ORGAN OF THE 



SOUTH AFRICAN ASSOCIATION 



FOR THE 



ADVANCEMENT OF SCIENCE. 







PORT ELIZABETH. W L1 



Iss2ted Monthly. 



/OL. IX. SEPTEMBER, 1912. NO. 2. 



CAPE TOWN. 



PUBLISHED BY THE ASSOCIATION. 



191 2 [Price 2s. 



