THE 



SOUTH AFRICAN JOURNAL 

 OF SCIENGEi 



BEING THE ORGAN QF THE 



SOUTH AFRICAN ASSOCIATION 



FOR THE 



ADVANCEMENT OF SCIENCE. 





Issued Monthly. 



ro^\: 



VOL. VIII. MAY. 1912. NO. 10. 



CAPE TOWN. 



PUBLISHED BY THE ASSOCIATION 



191 2 Price 2s. 



