THE 



SOUTH AFRICAN JOURNAL 

 OF SCIENCE: 



BEING THE ORGAN OF THE 



SOUTH AFRICAN ASSOCIATION. 



FOR THE 



ADVANCEMENT OF SCIENCE, : 



- <'j i* ■ ■» A> '^•- ■ '^ 



Issued Monthly. '-^p. V 



V 



VOL. VIII. FEBRUARY, 1912. NO. 7. 



CAPE TOWN. 



PUBLISHED BY THE ASSOCIATION 



1 91 2 Price 2s. 



