Tent and Camera : The Tools of Bird-Photography. 35 



supplies close at hand. Under these conditions it is not necessary to carry more than two 

 or three dozen plates at a time. By developing on the day of exposure it is possible to 

 correct errors or fill up the gaps on the day following. 



Orthochromatic plates require careful treatment, but in skillful hands offer advan- 

 tages which should not be neglected. This is well illustrated in the case of birds of bril- 

 liant colors like the Orioles, which on ordinary plates appear as " Blackbirds " (compare 

 figures 14, 15). 



Accessories. The minor articles which are needed to complete the photographer's 

 outfit, all of which can be rolled up with the tent or better carried in a hand bag, will be 

 suggested by a little experience in the field. A saw, hatchet and nails are often required, 

 as well as scissors, pins, the supply of which is- always liable to run out, and a small hand 

 mirror for use in setting the shutter from the rear. A toilet hand mirror which can be 

 turned at any angle is a convenient means of inspecting the interior of nests inaccessible 

 to the hand, but within reach of the mirror attached to a pole. 



