74 



and consider this essential to success. And so it is 

 with sib-bred birds — the strain must be strengthened 

 by the occasional addition of fresh lij^ht-muling 

 blood, thus avoiding the deterioration of the size of 

 the mules which must otherwise ensue. 



In closing, I repeat that close in - breeding, 

 continued for several generations, will certainly pro- 

 duce weakness and sterilit3% and my advice is, when 

 fresh blood is wanted, — and this will be apparent 

 from the size of the stock — be sure to procure it from 

 a light-muling stock, whatever it may cost. 



J6ir&6 in a Suburban 6arJ)cn. 



The following list of British birds supplied by Mr. 

 Howard Williams, comprises those species which have 

 been seen in his garden at North Finchley, within 

 six or seven miles from the Royal Exchange. Those 

 marked with an asterisk have bred in the garden. 



*Blackbird 



Blackcap 



Bullfinch 



Yellowhanniier 

 *Cliaffinch 



Chiffchaflf 



Creeper 



Crow 



Cuckoo 

 *Hed«^e vSparrow 



Fieldfare 



Flycatcher 



Goldcrest 



Goldfinch 

 *Greenfinch 



Hawfinch 

 *Jackdaw 



Skylark 



Linnet 



Nuthatch 

 *Woc)dpigeon 



Meadow Pipit 

 *Robiii 



Redpoll 



Redwing 



Rook 



Siskin 

 *Sparrow 



Sparrow (Tree) 

 *Starling 



Swallow 



Martin 



Martin (Sand) 



Swift 

 *Thrush (Song) 

 *Thrush (Missel) 

 *Blue Tit 



Coal Tit 

 *Great Tit 



Long-tailed Tit 



Pied Wagtail 



Yellow Wagtail 



Garden Warbler 



Owl (White or Barn) 



W^illow Warbler 



Whinchat 



Woodpecker (Lesser Spotted) 

 *Wren 



W^ryneck 



Sparrow Hawk 



