SEA-FISHERIES LABORATORY. 



283 



For these reasons, considerable importance is 

 attached to the physical investigation of the sea at these 

 points, and the results of the hydrographic cruises of the 

 years 1907-1912 are given in Table X. The figures are 

 the means of the three stations, and only the surface 

 temperatures are considered. The " corrected tempera- 

 tures " are deduced by the method already described. 

 The figures in brackets (May and August of 1911) do not 

 represent the results of the hydrographic investigations 

 since no cruises were made in 1911 except those of 

 Februarv and November. The mean difference between 



Text-Fig. 2. Mean Sea-temperatures at Hydrographic Stations 5, 6 



and 7 during the_ months February, May, August and November of 



the years 1906-1913. The figures plotted are the "corrected" ones 



of Table X. 



the mean temperature of the sea at Carnarvon Bay Light 

 Vessel, during the middle ten days of May and August, 

 in the years 1907-1912 (except 1911), and that of Hydro- 

 graphic Stations 5, 6, and 7 at the same times, have been 

 calculated ; and the values in brackets represent the 

 temperatures at the lightship, minus this difference. It 

 is probable that any error so involved is insignificant : 

 the year 1911 was obviously a year of high range of tem- 

 perature, as shown by all the other results. 



Fig. 2 represents these mean temperatures at 





