PROPAGATION OF FISH. 251 
ered alive and healthy at the place of destination. For 
more accurate information it would be better to commu- 
nicate with him direct, and his breeding apparatus is 
well worth a visit. 
Besides the trout and salmon the only other fresh 
water fish worth breeding is probably the black bass. 
There are many localities where the water is too warm 
or quiet for trout, which demand cold and rapid currents 
flowing from fresh springs. The black bass will thrive 
in almost any clear pond with a pebbly or sandy beach 
on which they can deposit their ova. Like all the perch 
family, they spawn in April and May, and hatch in a 
much shorter time than trout, or in about two weeks ; 
they build their nests in the sand, and extrude the milt 
and roe by pressing upon or between roots and stones, 
and either cover or leave exposed their eggs. They may 
be treated in the same manner as trout, but do not 
require the running water nor one half the care and 
attention. Tlieir increase is still more rapid. 
Undoubtedly the mascallonge could be acclimated and 
treated in the same manner, and the striped bass might 
be introduced into and confined to the fresh water with 
eminent advantage. 
There is also an opportunity for novel and interesting 
experiments in the crossing of various species, upon 
which there is little definitely known except that it can 
be done. The spawn of trout has been impregnated with 
the milt of salmon and has produced young, but what 
the young were, and whether they were capable of 
breeding among themselves, is not settled. 
Salmon give a much greater quantity of eggs than the 
