24 STEREOSCOPIC PHOTOGRAPHY 



tapes are sewn over the bag to which twigs and 

 branches, etc., can be tied for the purpose of dis- 

 guising the tent. The whole arrangement is very- 

 portable, folding up into a small space; and it 

 costs very little, a few shillings at the outside. 



Such a tent is useful even if the Scout is not a 

 photographer. He can easily carry it with him on 

 his expeditions, and erect it in a few moments 

 wherever he wishes to make any Nature observa- 

 tions upon living things. When it is well-hidden 

 in twigs and branches, or bracken, it is practically 

 invisible. If he chooses to go to a little more 

 expense and use canvas for the covering instead 

 of lining, he may even use it for camping out ! 



HINTS ON EXPOSURE AND DEVELOPING 



The only other matter upon which my attention 

 has been specially directed is the taking and de- 

 veloping of Nature photographs. 



I am quite sure that the best rule is " Give the 

 longest exposure you can." Never take an in- 

 stantaneous photograph unless there is no other 

 way left. Except in well-lighted places, and 

 during the brightest of the weather, it is impos- 

 sible to obtain well-exposed negatives with instan- 

 taneous exposures unless a very expensive lens, 

 working at an aperture such as /5.6, is used. These 

 lenses are out of the reach of most boys, and, what 



