SEA-FISHERIES LABORATORY. 107 



On each cruise two lines of stations were worked : — 



(1) Piel Gas Buoy, Walney Ch. to Maughold Head. 



(2) Calf of Man to Holyhead. 



Four " stations " were worked on each line : — 



(1) 6 miles N.W. from Piel Gas Buoy. 



(2) 15 ,, ,, ,, ,, 



(3) 24 „ „ 



(4) o<c ,, ,, ,, ,, 



and (5) 7 miles S. by W. from Calf of Man. 



(6) 16 „ 



(7) 25 ,, ,, ,, ,, 



(8) 33 ,, ,, ,, ,, 



It was decided that observations should also be made 

 in Carnarvon and Cardigan Bays during the third cruise, 

 but bad weather prevented these from being carried out. 



Bacteriological Work. 



A good deal of Mr. Johnstone's time has been 

 occupied with questions of sewage contamination of shell- 

 fish beds on the Lancashire and North Wales Coasts. The 

 investigation of such cases, both on the ground, where 

 adequate samples have to be taken, and also subsequently, 

 as a matter of bacteriology in the laboratory, is of very 

 great importance and some difficulty. The responsibility 

 attaching to such work is very great, because of the 

 possible danger to public health on the one hand, and the 

 possibility of injuring a prosperous industry on the other. 

 The Scientific Sub-Committee have had several carefully 

 considered reports from our laboratory during the year, 

 and the results of Mr. Johnstone's examination of the 

 Morecambe and the Conway mussel beds are given below. 



