HYDROGRAPHIC INVESTIGATIONS 



6i 



extendcd, observations are made as far as possible simul- 

 taneously elsewhere in ail Northern European waters.* 



In the.Irish Sea area semi-diurnal records are made of the 

 surface température at the varions light vessels, hourly records 

 are made on the Lancashire Fishery Committee's investigation 



Surface chart, August i896 



^^^M Atlantic water [!-■'_-" J Arctic water ['^i^v^::^] Coastal and bank water 



FiG. 9. 



steamer James Fletcher, and in addition periodic hydrographie 

 cruises are made by the same vessel, thèse cruises synchronis- 

 ing with those of other fishery research vessels — i.e., those of 

 Ireland and Scodand. The hydrographie cruises are usually 



* Furthcr détails are given for varions localities in the chapter on Océan 

 Currents. 



