192 MARVELS OF FISH LIFE 
When it is desired to photograph a fish illuminated as 
in nature, I shall fix a rough canvas tent in front of one 
of the glass sides, which will take the place of the dark 
chamber in the pond, and I shall bank up the other 
glass side with rocks, reeds, or seaweed, and thus obtain 
photographs of fish with the illumination entirely from 
above, as in nature, 
