Recently published Ornithuloyical Works. 14-3 



others are devoted to St. Kilda, the scene of Mr. Clarke's 

 labours in the autumn of 1910 and 1911, where the results 

 were but little less successful than in Pair Isle. The author 

 hopes to obtain further details as to the spring migration, 

 through George Stout, a native of the islarul last mentioned, 

 who has supplied many excellent notes^ after being trained 

 for the purpose. 



The whole book is replete with information on British 

 Migration — for the studies chiefly refer to our islands — and 

 a great deal may be learnt from it, as to the course taken 

 by the birds on their journeys to and from our shores, as 

 well as on the most suitable weather. In the chapter on 

 Meteorological Conditions this is fully discussed, with charts 

 verified by Dr. Shaw at the Meteorological Office. Birds 

 appear to start about 7 p.m., the winds between south and 

 east being the most favourable, and those between west and 

 north comparatively unfavourable : the actual direction of 

 the wind is not a matter of great importance, it is rather the 

 type of weather which accompanies it at the starting-point 

 that tells. In the favourable anticyclones fogs are common, 

 and then the Lights act as decoys; in clear weather little is 

 seen of the birds. High winds are naturally adverse, while 

 the temperature is important. 



The earlier chapters are devoted to the causes of migration 

 and the ancient and modern Ideas on the subject, while 

 others discuss the routes usually taken, and give charts of 

 lines of flight. Eight are devoted to individual species, 

 the Swallow, the Fieldfare, the White Wagtail, the Song- 

 Thrush, the Skylark, the Lapwing, the Starling, and the 

 Kook ; and these, which are reprinted from the British 

 Association Reports, have been carefully revised and largely 

 supplemented. 



Coward on Migration. 



[The Migration of Birds. By T. A. Coward. Pp. x-|-138, Cambridge 

 (University Press), 1912. 8vo. Price Is.] 



The present forms one of the volumes of the Cambridge 

 Manuals of Science and Literature, edited by Dr. P. Giles 

 and Prof. Seward. It is a reasonable little book, and does 



