SEA-FISHERIES LABORATORY. 183 



Further Remarks on the above 

 Scheme. 



I. Hydrographic and Plankton Investigations. 



These investigations were commenced in 1906. 

 There were then three lines of Stations : — (1) Piel Gas 

 Buoy to Calf of Man (parallel of latitude 54° 00"); 

 (2) Calf of Man to Holyhead ; (3) across the mouths of 

 Carnarvon and Cardigan Bays; ten Stations in all. 



These Stations were visited regularly (at three- 

 monthly intervals) during the years 1907 and 1908. 



In 1909 one line of Stations (3) was discontinued; 

 while two new lines were then added : (4) Liverpool 

 North- West Light-vessel to Calf of Man, four Stations; 

 and (5) Piel Gas Buoy to Maughold Head (Isle of Man), 

 three Stations. 



Lines 1 and 2 were investigated monthly (except in 

 December) during 1909, and Lines 1 to 5 were investigated 

 quarterly. 



In 1910 the Lines 4 and 5 were discontinued 

 pending the receipt of support from the Treasury, and 

 only quarterly cruises were carried out. 



In 1911 it was found necessary to discontinue the 

 May and August quarterly cruises. 



In 1912 the Stations on Lines 1 and 2 were investi- 

 gated in February, and in May Lines 4 and 5 were 

 re-instated. Three new Lines were added: — (6) St. Bees 

 Head (in Cumberland) to Bahama Light-vessel 

 (Isle of Man), (7) Point of Ayre (Isle of Man) to Mull of 

 Galloway (Scotland), and (8) Mull of Galloway to St. Bees 

 Head — bringing the total number of Stations up to 24. 

 These are the Stations included in the present scheme of 

 investigations as laid before the Development Commis- 



