13 



passed on. Thus the immig-rations in many cases formed 

 merely arbitrary divisions of individuals and did not repre- 

 sent birds belonging' to any particular breeding-quarter. 



The following table gives the number of immigrations 

 observed, together with the weather conditions in the 

 English Channel, for each day during the chief immi- 

 gratory period : — 





2 ^ 



As 



compared with the previous 



day. 









Month 

 and 

 Day. 



Barometer. Temiie 



rature 



■ 



Direction and 



Force 



of Wind. 



General 

 Character of 

 Weather. 



o ° fi 





Inches. 





Degrees 











Fahr. 









2i w 





Prom To 





From 



To 







Apr. 7 







Falling 



30 



29-8 



Warmer 



40 



46 



W moderate 



Overcast, rain 



,, 8 



3 ( Rising 



29-8 



30 j 



Colder, England 

 Warmer, France 



46 

 46 



36 

 50 



] N light [ 



Fine early 

 Overcast later 



„ 9 



tl Falline 



30 



297 



Colder 



35 



42 



SW moderate 



Rain 



„ 10 



9 Falling 



29-7 



29-3 



Warmer 



42 



47 



SW strong 



Rain 



., 11 



10 Low, 



steady 



29-3 



29-3 



Warmer 



47 



60 



SW light 



Rain 



,, 12 



7 



Rising 



29-3 



29-7 



About the same 



50 



48 



SW light 



Dull and misty 



„ 13 



2 



Rising 



29-7 



29-9 



slightly warmer 



48 



51 



S to SE light 



Misty 



,. 1* 



4 



Falling 



29-9 



29-7 



Ahout the same 



51 



50 



S to SE strong 



Misty 



„ 15 



4 



Steady 



29-7 



29-7 



About the same 



50 



50 



SE strong 



Overcast 



„ 16 



5 



Falling 



29-7 



29-6 



About the same 



50 



50 



S to SE strong 



Rain 



„ 17 



3 



Rising 



29-6 



299 



Colder 



50 



48 



E strong 



Overcast 



„ 18 



4 



Rising 



29-9 



39-1 



Colder 



48 



44 



NB strong 



Overcast, sleet, 

 and rain 



„ 19 



2 



Falling 



30-1 



29-9 



Colder 



44 



40 



NE moderate 



Hail and sleet 



„ 20 



3 



Falhng 



29-9 



29-7 



About the same 



40 



41 



NE strong 



Overcast 



„ 521 



1 



Rising 



29-9 



30-1 



Warmer 



41 



43 



NE strong 



Overcast 



„ £2 



1 



Rising 



30-1 



30-3 



About the same 



43 



44 



N moderate 



Clearing up 



„ 23 



2 



Falling 



30-3 



30-1 



Warmer 



44 



47 



NW moderate 



Overcast 



,. 24 



3 



Falling 



30-1 



29-9 



About the same 



47 





NW slight 



Showery 



,, 25 



4 



Rising 



29-9 



30 



Warmer 



47 



50 



W light 



Showery 



„ 26 



6 



Steady 



30 





About the same 



50 





W light 



Fine all over 



















SW Europe 



„ 27 



8 : steady 



30 





About the same 



50 





SW moderate 



Overcast 



„ 28 



6 



Falling 



30 



29-7 



Warmer 



50 



52 



SW fresh 



Overcast, rain 



„ 29 



4 



Falling 



29-7 



29-5 



Colder 



52 



49 



SW strong 



Overcast, rain 



„ 30 



1 



Falling 



29-5 



29-1 



Colder 



49 



48 



SW to S strong 



Orercast, rain 



May 5 







Rising 



30- !• 





Cold 



45 





NE strong 



Clear 



„ 6 



2 



Fal ing 



30-4 



30-3 



Warmer 



45 



49 



NE strong 



Clear 



„ 7 



5 



Falling 



30-3 



30-1 



About the same 



49 



50 



N light 



Fine and clear 



,, 8 



5 



Rising 



30-1 



30-2 



Slightly warmer 



50 



52 



N light 



Fine and clear 



„ 9 



4 



Rising 



30-2 



30 4 



About the same 



52 



50 



N light 



Fine and clear 



,, 10 



1 



Steady 



30-4 



30-3 



Warmer 



50 



53 



Variable, light 



Fine and clear 



It will be seen from the above table that migration 

 proceeded apparently with little reference to weather 

 conditions, but it will be noticed that during the periods 

 marked by the largest number of immigrations, viz., April 

 9th — 12th, and 26th— 28th, and May 7th — 9th, the 



