270 



THE ZOOLOGIST 



that "no wind from the right quarter, presumably N.E., blew with 

 sufficient strength or -persistence to reawaken the instinct of migra- 

 tion." 



Weather Analysis Table, November and December, 1906. 



Date. 



Direction. 



Character of Weather, &c. 



Nov. 19th, 20th 



„ 21st to 24th ... 

 „ 25th to 28th... 

 ,, 29th 



N.W. 

 S.W. or S.E. 

 N.W. or W. 

 S.W. 

 N.W. 

 N.W. 

 N.W. 

 N.E. 

 N.W. 



W. 



N.W. 



S.E. 

 N.W. 



N.E. 



S.W. 

 N.W. 

 N.E. 



S.W. 



N.W. 



Wind steady. 



Gentle, but steady wind. 



Breezy. Wind west on 27th. 



Calm. 



,, 30th 



Wind steady. 



Strong wind ; bright clear weather. 



Dec. 1st 



„ 2nd to 5th 



„ 6th to 7th 



„ 8th to 11th ... 



,, 12th 



Steady wind ; S.W. on 3rd. 

 Strong on 6th ; frost on 7th. 

 Strong cold wind on 9th and 10th, 



with hard frost. 

 Strong cutting wind. 

 Steady cold breeze. 

 Mild, with " Scotch mist." 



„ 13th to 15th... 

 „ 16th 



„ 17th and 18th 

 „ 19th to 23rd... 



,, 24th 



Mild and calm. 



Steady breeze ; hard frost 21st to 



23rd. 

 Steady breeze ; hard frost followed 



,, 25th to 28th... 

 ,, 29th 



by thaw. 

 Strong wind; blizzard and snow on 



26th, with keen frosts. 

 Steady wind, but many degrees of 



frost. 

 Strong wind, thaw, and rain. 

 Steady breeze and milder. 



,, 30th 



,, 31st 





Now, it will be seen from the above weather table that, with 

 the exception of one day (27th), from Nov. 25th to 28th the wind 

 blew steadily from the N.W. 



This answers the point with regard to " persistence," and I 

 should imagine a N.W. wind would be quite as favourable 

 as one from the N.E. for migrating birds, or those, at any rate, 

 which desired to migrate. A steady breeze from this direction 

 would carry the birds across the English Channel, and land 

 them safely on the shores of the Mediterranean in a few hours ; 

 whereas a N.E. wind would be more likely to carry them further 

 out to sea, and thus render the journey much longer and more 

 dangerous, because they would have to cross the Bay of Biscay, 

 where adverse winds might carry them quite out of their course. 



