CONTENTS. 
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Page 
On the Migration of Birds .......... 0.00.0 ce cee eee 1 
On the Notes of Birds swe, coe sere avai eer ewes vee ee 26 
Observations on the Cuckoo........ Wietiuncss Vols waka eter 49 
Additional Observations on the Cuckoo ................ 76 
On the occasional Desertion of their Progeny by Birds of the 
Swallow Pabe: ntcnctaieierwi due gh dikagvaee a nihes 85 
An Inquiry into the supposed capability of the Periodical 
Birds to become Torpid................... een wad 101 
On the Instincts of Birds............ 00.00.20 cece eee 115 
Observations on the Pied Flycatcher ........./........ 147 
A brief notice of Bewick’s Swan ............00-- 000 eee 152 
On a remarkable Formation of the Bill observed in several 
Species of Birds. isc wes aysiesaGeda genie ke he 157 
On the Nudity of the anterior part of the Head of the Rook 
(Corvus frugilegus) .. 0.6 cee eee 160 
Remarks on the Diving of Aquatic Birds .............. 166 
Some account of the Manners of the Grenadier Grosbeak 
(Lowia oryx, Linn.) when in Captivity ............ 172 
Description of Falco Auduboni.... 0.00. eee eee eee 178 
Description of Lamprotornis Vigorsti ....... 02.25.0005 181 
On the Growth of the Salmon (Salmo salar) and of the Sewin 
(Salmo cambricus).. 0... cee ees 184 
A remarkable Physiological Fact...................... 205 
On the Injury done to the Foliage of the Oaks in the Neigh- 
bourhood of Manchester in the Spring of 1827 ...... 207 
