174 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
the Solway is lower still, because of its more northerly 
situation. The temperature of the sea at both of these 
stations 1s greatly influenced by the excessive rainfall of 
the land adjacent to them. 
The date of the minimal temperatures is very much 
the same at the various stations, occurring during 
February, except in the case of the Carnarvon Bay station, 
where the minimum occurred in March. ‘The dates of 
the occurrence of the maximal temperature vary a little 
more, occurring in September in Cardigan and Carnarvon 
Bays, and a little earlier at the other stations. There is 
no doubt, of course, that the rise of temperature cul- 
minates at a shghtly different time of the year in each 
case, but several years’ records will be required before 
this can be exactly determined. 
Irregularities in all the curves, due to the weather | 
changes experienced in 1907, are to be observed. It is 
worthy of note that these changes were much smaller at 
the Carnarvon Bay station than in any of the others, 
indicating that the water offshore from this Bay is less 
affected by the heating or cooling action of the land than 
at any point in the Irish Sea, or in the immediate 
neighbourhood of the Isle of Man. They are greatest in 
the case of the sea near the Morecambe Bay vessel, which 
is influenced by the adjacent land to a quite remarkable 
degree. 
Minor Temperature variations. 
Apart altogether from the annual temperature wave, 
and the smaller ones superposed upon it, as the results of 
weather variations, there are still smaller changes of 
temperature due to other causes. If the daily tempera- 
tures at any one of the Light Ship Stations be plotted a 
curve will be obtained which is remarkably “ jumpy, ” 
