TRANSACTIONS 
OF THE 
EOYAL SOCIETY OF SOUTH AFKICA. 
VOLUME IX.— PART 1. 
1921. 
( FEB 2 1921 ) 
CAPE TOWN: 
PUBLISHED BY THE SOCIETY. 
1921. 
Ittued January 6th, 1921.] 
[Price IIS. 6<l. 
