APPARATUS AND GENERAL ADVICE. 



3 



are far too quickly in and out of the field of vision 

 commanded by the duplicate to allow its manipu- 

 lator to make any attempt at focussing. In such 

 cases the only 

 thing possible is 

 to watch the birds 

 fly across the 

 plate of ground 

 glass, and directly 

 one appears fairly 

 well in focus to 

 snap off and thus 

 secure a picture 

 before the object 

 has passed out of 

 view. Although 

 the miniature 

 camera is a very 

 useful accessory it 

 is not absolutely 

 necessary, and I 

 should not recom- 

 mend the beginner 

 to go to the ex- 

 pense of providing 



himself with one until he has had a good deal of 

 experience. 



The most useful [thing about a natural-history 

 camera is a silent shutter. One of the most 

 acute senses in all wild animals is undoubtedly 



OUH CAMEKA. 



