American Big-Game Hunting 
purpose in view. For my lens I used a Dall- 
meyer rapid rectilinear, whole-plate size. I 
used only the back combination of the lens, 
which gave a focal length of about twenty- 
two inches. The lens was equipped with a 
Prosch duplex shutter, which was, I found, 
even when set for its lowest speed, too rapid 
for my purpose. In determining upon a 
camera, I had already arrived at the following 
conclusions: the camera must be a hand 
camera, equipped with a film-roll holder; it 
must be water-proof, light, not easily dam- 
aged, and of small size—z. ¢., must make only 
a small-sized negative; focusing must be done 
at the front by moving the lens. 
To obtain these conditions, I constructed 
my first camera in the following manner: I 
made a rectangular core of wood exactly 
the shape I wished the inside of my camera 
to be. The front end of this core was cylin- 
dricall) I ‘then built. up om this coreven 
wood a paper shell, using strong Manila 
paper saturated with shellac as it was rolled 
upon the core. This was then wound with a 
strong cord at intervals of about one half 
inch, in order to provide cell spaces and conse- 
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