and Laboratory Methods. 



1241 



LABORATORY PHOTOGRAPHY. 



Devoted to methods and apparatus for converting an object into an illustration. 



THE VALUE OF THE TELEPHOTO LENS. 



The value of the telephoto lens to the naturalist has been shown in many 

 ways. Photography has reached such a stage that it is impossible for a 

 naturalist to do without it. In order to do the best work it is necessary to carry 

 several lenses, or combinations which will produce both long and short focus, 

 depending on the object to be taken. 



PHOTOGRAPH MADE WITH ORDINARY 

 PHOTOGRAPHIC LENS. 



PHOTOGRAPH MADE WITH SAME LENS 

 AND THE TELEPHOTO. 



The accompanying pictures show how a telephoto lens was necessary to 

 secure a picture of an osprey's nest which was in the top of an old pine tree, 

 around the base of which there was a dense jungle of underbrush. The view 



