SEA-FISHERIES LABORATORY. 235 



so clearly indicated by the direction of the isotherms, 

 because the positions of the latter are affected by heating 

 up of the water oscillating towards and from the banks oif 

 the Cheshire and Lancashire coasts. It is quite clear, 

 however, that there is now a general translation of warm 

 water from Liverpool Bay along the Lancashire coast, and 

 then to the North-west, and there are distinct indications 

 of the flow of this water round Point of Ayre, in the Isle 

 of Man, towards the North Channel. It is also clearly 

 evident, from this and the previous charts, that the 

 northerly drift of water from St. Greorge's Channel 

 slackens at about the latitude of the Calf of Man, and 

 that the sea West and South from this point is a relatively 

 stagnant area. It is also apparent that South from the 

 Calf of Man, towards Holyhead, the water is rather 

 colder than in the fairway of the Channel, to the West, 

 and towards the West coast of England on the East. 

 There is the same increase of temperature, passing down 

 channel from Anglesey, as is indicated in the previous 

 charts. 



June 16th, 1909. 



The observations made in this month were those of 

 an intermediate cruise which was extended into the North 

 Channel and Firth of Clyde. The number of stations 

 which were investigated North from the Isle of Man were, 

 however, very few, and I have made no attempt at 

 drawing the isotherms further North than adjacent to the 

 Isle of Man. The temperatures have been plotted in 

 fig. 28, and it will be seen that a very large part of the 

 Eastern half of the Irish Sea is now filled with relatively 

 warm water which is apparently drifting to the North- 

 west. In the charts representing the conditions in 

 February, March and May the isotherms were generally 



