Wind S.W., force 



36 



May 31st .... Bar. 29-83 in. T. 53° F. 

 Weather, b. 

 Centre of depression had passed N. of Scotland. 

 Strong S.W. winds over our area. Weather fair 

 generally and the fog had cleared, bat showers 

 reported from many places. Temp, lower ; under 

 55° F. everywhere. 



Note. — In the maps which illustrate the migrations of 

 the following species an attempt has been made to trace 

 their course by separating and grouping the different move- 

 ments, but it must be understood that this grouping is to a 

 certain extent artificial and is only done for the sake of 

 clearness. The successive immigrations are indicated on 

 the maps by the following signs : — 



First immigration thus : — 2 



Second 



Third 



Fourth 



Fifth 



Sixth 



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