THE 



SOUTH AFRICAN JOURNAL 

 . OF SCIENCE: 



BEING THE ORGAN OF THE 



SOUTH AFRICAN ASSOCIATION 



FOR THE 



ADVANCEMENT OF SCIENCE, 



Issued Monthly. ,^. 



■ ' <K^. ' Uff ^ • ' 



^-..-r'iU.^" 



VOL. VIII. JULY, 1912. NO. 12. 



CAPE TOWN.' 



PUBLISHED BY THE ASSOCIATION. 



igi2 ^, [Price 2s. 



