170 MARVELS OF FISH LIFE 
tance of forty feet. The plate glass had burst in con- 
sequence of unequal expansion of the glass, due to 
the cold water on the one side and the intense heat of 
the sun on the other. It was a narrow escape, and on 
the few occasions that I have used this tank since, I 
have always kept the glass shaded until actually 
wanted for photography. 
To those likely to go on fish photographie excur- 
sions I would strongly recommend them to confine 
their attentions to the West Coast. Here the water 
is much clearer than on the East Coast, and renders 
photography, both in tanks and in natural environ- 
ments, an easier matter. 
Hitherto I have confined my remarks to tank photoes 
graphy alone, but far more fascinating is the photo- 
graphy of fish in their natural environments. It is pos- 
sible to undertake this in various ways. The reader 
may don a diver’s suit, as did Dr. Bouton, of Paris, and 
descend into the sea with the camera encased in a 
water-tight box; or sink a camera with a fixed focus 
into the water, and expose the plate by pulling a string. 
Professor Reighard, of Michelin, wades into the water 
with a reflex camera merged below the surface. These 
methods, however, do not appear to have given very 
satisfactory photographic results, for the simple reason 
that it is necessary to be within a few feet of a fish to 
photograph him under the water, and the operator not 
being concealed, the fish do not stay to be photo- 
graphed. It certainly might be possible to descend in 
