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favorable as they can be made by combining the natural 
and artificial. There is no necessity for the introduction 
of any foreign material to stimulate a production of the 
crustaceans, as the natural conditions afford all the 
requirements for sustenance, but infusions of dung or 
vegetable matter will attract ephemera and other flies to 
deposit their eggs. Nor is there any necessity for driv- 
ing fish from one pond to another, as the food can 
easily be caught and transferred to the fish basins. 
Let any trout culturist make a small cheese-cloth net, 
and using it among water cresses or other aquatic plants 
in shallow water, note the immense numbers of’ larvze 
and crustaceans that may be taken. 
Or, make the experiment of spreading the water flow- 
ing from a spring so as to make it shallow. Plant it 
thickly with water cress and nature will speedily stock it 
with animal life. Again, take a small pond or trench 
without fish and put into it a few Daphnia and Cyclops, 
and note the result. 
The experiences of the writer confirm those of the 
European fishculturists who have applied these methods 
to trout culture, and he has no hesitation in recommend- 
ing them to American trout culturists as worthy of gen- 
eral development. They are applicable as well to the 
rearing of any kind of fish, carnivorous or vegetarian (so 
called). 
The writer took the ground at the last meeting of the 
society that the time would come when greater areas 
would be devoted to the rearing of natural food for 
young fish than to the holding of the fish themselves, 
and that enough food to rear a yearling trout can be 
produced within the limits of a cubic foot of water. 
The advantages of an artificial system over purely 
natural conditions in the production of these creatures is 
the same as in the propagation of fish. Where exposed 
to the ravages of the fish themselves the multiplication 
will be slow, if not wholly arrested, because the breeders 
