THE 



SOUTH AFRICAN JOURNAL 

 OF SCIENCE: 



BEING THE ORGAN OF THE 



SOUTH AFRICAN ASSOCIATION 



FOR THE 



ADVANCEMENT OF SCIEN|;^^^?^^ 



sr- 





Issued Monthly. ^'\^^''^'<4 



VOL. VIII. DECEMBER, 1911. NO. 5. 



CAPE TOWN. 



PUBLISHED BY THE ASSOCIATION 



191 1 [Price 2s 



