of the Fishery Board for Scotland. 421 

 Temperatures of Surface Water in St Andrews Bay. 



Shore Stations — Near the mouth of the Eden. 



Stations 



I. W. 



II. W. 



III. W. 



IV. W. 













Summer, .... 



8-4 



8-3 



8-6 



8-2 



Winter, .... 



6-1 



6 0 



6 3 



6-3 



Range, 



2*3 



2 3 



23 



19 



Bay Stations — From Kingsbarns to Abertay. 



Stations 



V. S.E. 



I. E. 



II. E. 



III. E. 



V. N.W. 



IV. E. 





] «f-> . i 



o 





o 



o 





Summer, 



7-7 



7-8 



8-1 



8-0 



7-7 



7-7 



Winter, . 



6-5 



6 5 



6-4 



6'5 



6 5 



6-2 



Range, . 



1-2 



13 



17 



1-5 



12 



1-5 



It appears that the nearer inshore the observations are made the maxi- 

 mum temperatures become higher and the minimum lower, and so the 

 annual range is the greater. Thus the greatest range is found at these 

 Stations near shore and is 2° 3, whereas the smallest is little more than 

 half (1°'2) and is that of Station V. the furthest out in the bay. 



The grouping of the specific gravity observations gives the following 

 results : — 



Stations 



IV. W. 



II. E. 



V. S.E. 



V. N.W. 





1892. 













Summer, 







1024-9 



1024 7 



1025-5 



1025 3 



Winter, 







1024 4 



1024*8 



1025-1 



1024-6 



Mean, . 







1024-6 



1024-8 



1025-3 



1025 0 



The mean specific gravity of the Station nearest the shore is the least, 

 and is greatest in the south side of the bay, where the river waters have, 

 least influence. The salinity is most constant at the southern part of the 

 bay, and varies most where the fresh water is most abundant : the great 

 range at the north end of Station V., which is well away from the shore, 

 may be due in part to the influence of the Eden, and in part to that of 

 the Tay. 



The general result of these observations in St Andrews Bay is to show 

 that the physical conditions are very constant in the southern part, and 

 have somewhat greater variations in the region where the river waters 

 mix with those of the sea ; and that the water at a distance from the 

 shore is steadier in temperature, and of slightly greater transparency, no 

 doubt on account of the sand stirred up by the waves near shore, and the 

 gradual settling down of the mud carried out by the rivers towards the 

 open sea. 



