318 



TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



work is, perhaps, nearly all that can be desired. But it 

 is quite clear that this work is not carried out with the 

 thoroughness that is necessary for the complete 

 demonstration of the relationships sought, apart 

 altogether from the possibility of the prediction of the 

 productivity of a fishery. This is the main result of a 

 study of the physical and statistical data obtained in a 

 relatively small sea-area, where the observations are 

 probably more numerous than almost anywhere else in 

 the British Seas. It has not, so far, been realised that 

 fishery investigations of this kind ought to be conducted 

 with all the thoroughness and attention to detail, and 

 the desire to avoid all possible sources of error, that 

 characterise a laboratory investigation in chemical and 

 physical science. Of course the great scale on which a 

 fishery investigation must be carried on makes this 

 accuracy difficult of attainment, yet it is quite certain, 

 from a study of the data considered above, that without 

 it much of the labour expended must be futile. 



I. — Sea-temperatures at the Light- Vessels, 

 Monthly Means. 



1912. 



Carnarvon 



Liverpool 



Morecarabe 



Bahama 



Bay, 



N'rth-west, 



Bay, 



Bank, 



53° 6' N. 



53°31'N. 



53° 54' N. 



54° 20' N. 



4° 45' W. 



3° 31' W. 



3° 31' W. 



4° 13' W. 



8-94 



7-49 



6-16 



7-33 



8-21 



5-93 



4-93 



6-11 



8-21 



6-83 



6-72 



7-49 



9-04 



8-83 



8-61 



8-66 



10-91 



11-17 



11-99 



11-01 



12-16 



13-49 



13-60 



12-94 



14-44 



15-26 



15-94 



14-65 



14-82 



15-05 



14-77 



14-60 



1415 



13-77 



13-49 



13-49 



12-94 



11-93 



10-96 



12-04 



11-38 



9-44 



8-50 



10-06 



10-29 



8-27 



7-33 



8-38 



Solway, 

 54° 48' N. 

 3° 32' W. 



January .. 

 February 



March 



April 



May 



June 



July 



August . . 

 September 

 October . . 

 November 

 December 



5-40 

 4-86 

 7-11 

 9-49 

 11-72 

 13-89 

 16-43 

 14-38 

 13-06 

 10-23 

 7-72 

 6-21 



