214 



The curves on Plate VIII are drawn from these observa- 

 tions and show the mean temperature and specific gravity at or 

 near five stations between Table Bay and Simon's Bay. The 

 most striking feature is the sudden rise at Cape Point, both in 

 temperature and specific gravity. There is, however, a rise of 

 temperature and specific gravity in a less degree both on the 

 west and east side of the Peninsula, viz., from Sea Point to Hout 

 Ba}', and from Cape Point to Smitswinkel Bay. The slight fall 

 in temperature between Hout Bay and Slangkop would perhaps 

 disappear if the curve were drawn from a more extended 

 series of observations, as the individual series show great ranges 

 of temperature in short distances. This is shown in curves drawn 

 from one of these series (Plate IX). The vertical lines here 

 represent intervals of 5 minutes during the voyage, or a little less 

 than three-quarters of a mile, and in this short distance we find 

 in one case a rise of temperature of two and a half degrees near 

 Slangkop Point. The longest interval on the voyage in which 

 the same temperature was observed was one half- hour, repre- 

 senting about 4i miles This occurred between Cape Point and 

 Simon's Bay. 



Plate X shows the mean temperature and specific gravity 

 observed at intervals between Table Bay and Danger Point by 

 the mail steamers. These means have been deduced from 21 

 observations, selected from a series taken between Table Bay and 

 Port Natal, which will be fully dealt with in a later paper. 



They illustrate the same general rise of temperature, most 

 marked at Cape Point, and the same striking rise in specific 

 gravity already noted (Plate VIII). 



The following is the detailed record of these observations : — 



