199 



It will be observed that the depth where the greatest change 

 occurs is greater as we proceed from land. The mean depth at 

 which the change occurs at Stations within 15 miles of the land 

 is about 8 fathoms, at Stations further to sea 24 fathoms. 



Briefly summarizing the results of these observations we find 

 that there is off the Cape Peninsula a body of warm water of a 

 higher temperature than that closer inshore, and in one instance 

 higher than anything observed for at least 3 years in Table Bay 

 or False Bay ; secondly, that the difference of temperature within 

 a few miles is marked, as also is the range of temperatures at the 

 same Station in a few hours. Taking into consideration the 

 limited number of observations, we may reasonably presume that 

 further investigation will demonstrate these results in a still more^ 

 striking manner. 



//. Temperatures in Table Bay and False Bay (1898-1900). 



We consider secondly a more reliable series of observations^ 

 reliable not in the sense that the observations have been more 

 accurately made, but that they have extended over a longer period. 

 These have been made by the Lighthouse Keepers on Robben 

 Island in Table Bay and on Roman Rock in False Bay, and 

 probably contain errors of observation and inaccuracies (readings 

 of the thermometer being taken only to whole degrees) which do 

 not appear in the more careful observations made on board the 

 Government Steamer. 



It will be apparent that such data throw additional light on 

 those we have just been considering. 



Observations of direction and force of wind were also taken 

 with the daily temperatures, and these will probably afford some 

 key as to the cause of this change of temperature, but inasmuch 

 as this opens another aspect of the question, already complicated 

 enough, it may be left over for seperate and more detailed 

 investigation. 



The following tables show (A) the mean, maximum, minimum 

 and range of daily temperatures for each month of each year in 

 Simon's Bay and Table Bay, (B) the same for the three years 

 together, and (0) the mean, maximum, minimum and range of 

 daily temperatures for each year, and (D) the three years 

 together. 



