1909- Foster. — Observations on Weights of Birds'* E^gs. 217 



Swift {Cypselusa pus). 

 Inch. Inch. Grains. Inch. Inch. Grains. 



(a) Almost hatched. 1-07 x '64 = 42 (6) Fresh. 1-15 x -61 = 55 



1-05 X -64 = 49i 

 r X -65 = 41 



Barn-OwIv (Strix flamtnea)^ 

 Inch. Inch. Grains. 



1-64 X 1-26 S=: 348 

 T-62 X 1-26 = 353 



1-57 X 1-24 = 301 



In this clutch the first and second eggs were fresh, but the third was 

 rotten. 



I/ONG-EARKD OWI, {Asio otus). 



Inch. Inch. Grains. 



17 X 1-28 =s 374 

 1-6 X 1-25 = 343i 

 1-58 X 1-25 = 342i 



PKREGRINE Fai^CON (Fako peregrinus). 

 Inch. Inch. Grains. Inch. Inch. Grains. 



2-1 X 17 = 776* 2- X 1-65 = 697 



2-12 X 172 = 804 2-07 X 1-65 = 701 



Cormorant {Phalacrocorax carbo). 



Inch. Inch. Grains. 



1-65 = 978 

 1-65 = 963 

 1*65 = 9o6i 



G AN NET (5«/a bassana). 

 Inch. Inch, Grains. Inch. Inch. Grains. 



{a) 3-2 X 1-88 = 1.550 {b) 3-07 X 1-95 = 1,576 



Common Scoter {CEdemia nigra). 

 Inch. Inch. Grains. 



2*53 X 175 =^ 1.066 

 2-58 X 177 = i»^23 



A 3 



