402 Fisnine isn AmertcAn WATERS. 
dated ova far enough advanced to render their eyes distin- 
guishable, and they are hatching daily, thus proving its per- 
fect adaptability to the objects intended of hatching and pro- 
tecting the eggs. It differs from that of Mr. Ainsworth in 
having but one race, with perforated bottom of zinc, with 
three holes to the inch. The bottom is covered with pebbles, 
and accessible to the trout from his pond during the spawn- 
ing season, when may be frequently seen a dozen pairs of 
spawners at atime. The water flows gently down the race, 
and the spawners keep it constantly agitated throughout the 
spawning season, so that the fecundated ova falls through the 
perforated zinc bottom to the bottom of the stream, which is 
made of sand and gravel, on which the eggs hatch. 
It will be perceived that this race differs from the Ains- 
worth one, which has two perforated races or troughs above 
the bottom, from the lower one of which the fecundated eggs 
are removed to hatching-boxes, while the Furman race con- 
sists of but one perforated race or trough, from which the 
eggs fall to the bottom, and remain during the period of in- 
cubation, or until hatched. 
Ihave not deemed it necessary to illustrate the form of 
the Furman race, as it is similar to the Ainsworth one, only 
it has but one screen, and the bottom is not formed of mova- 
ble trays, but the eggs drop to the bottom of the stream, 
where they hatch as in a natural stream, only that they are 
protected from destruction by their parents or other families 
of the finny race, which have no access to the compartment 
of the stream. 
These imitations of the natural stream and spawning-beds 
are the latest invention in American fish-culture. Thus far 
they have proved successful, and promise to render unneces- 
sary the artificial fecundation by handling the spawner and 
milter for forcing exudation of the seed. These plans sim- 
plify artificial fish-breeding, and promise to prove a greater 
improvement on the French grilles and hatching-trays than 
were the latter upon the troughs with wire-cloth ends placed 
