i;o BIRD BIOGRAPHIES 



condition. This firm have recently intro- 

 duced a new Prism glass, which gives 

 more light and a larger field, and I can 

 say without the slightest hesitation that 

 this is the finest thing of its kind that 

 it is possible to obtain, or to wish for ; 

 and the naturalist equipped with one of 

 these glasses knows that he has some- 

 thing that will open up to him the secrets 

 of Birdland, and show him Nature in a 

 new light. A bird two hundred yards 

 away is quite unconscious that you are 

 watching it, and to see bird-life at its 

 best the bird must not know that you 

 are near. I put all the success of my 

 bioscope pictures down to the fact that 

 the apparatus is almost silent, and that 

 even when only five feet away from a 

 bird, it has not had the slightest idea that 

 I am hiding and obtaining a living record 

 of all its actions. If the bird hears any- 

 thing to make it at all nervous, then you 

 do not get a natural picture. It is the 



