SEA-FISHERIES LABORATORY. 



163 



velocity during the period, 19th May — 24th May was about 

 17 miles per hour, and during the whole period, 19th May — 

 June 5th, about 15 miles per hour. The general influence 

 of the wind was therefore to drive the bottles in a southerly 

 direction, and this brought them within the influence of the 

 stream setting into the Mersey estuary. Two bottles, 

 however, seem to have remained longer at sea, and during 



Fig. 3. — Apparent direction taken by six drift bottles, shewing 

 directions of tidal streams and the general direction of the wind. 



the later part of the period (June 5th — 20th) the wind was 

 very variable and light, and these bottles were probably 

 carried up the coast towards Blackpool. 



The results of this and former experiments seems to 

 show that the destination of fish eggs spawned on the 

 off-shore grounds either in the Lancashire or Welsh parts 



