[19] ARTIFICIAL PROPAGATION OF FISH. 509 
(1.) Some pisciculturists begin to disseminate the fish in the water 
which is to be stocked with them as soon as the umbilical sack has been 
absorbed; they maintain that the young fish, which at that time is par- 
ticularly lively and active, can escape 
dangers better than when it has grown 
larger. 
The fish, moreover, becomes accus- 
tomed to the water in which it is to 
grow, and will not have to undergo a 
change of water and food, nor be sub- 
ject to transportation, the expenses vi 
and difficulties of which increaseas the — |}\'///[ 
fish grows older. \ Mie 
(2.) Other pisciculturists feed the | 
fish for some time, and place them in 
special basins of different size, among |} 
which we would choose those of the yj} 
piscicultural establishment of Enghien- || | 
les-Baines, as modified by the Nether- +) 
lands Fish Commission (Fig. 24), 
which combines all the advantages of 
salubrity and easy management. 
We give only those explanations 
which are absolutely necessary for un- 
derstanding our sketch. The wooden 
sluice or the lead pipe A leads the 
water into the square basin b, which 
serves to filter the water; it is filled 
with stones and has a lid. 
On the opposite side of this basin 
there is the lead pipe C, which opens 
into the transverse pipe D, of the 
same metal; the four tubes E lead 
the water from the tube D to the 
upper basin F, whence, by means of 
faucets, it can be conducted into four 
lower basins, and even further, in such a manner as to allow it to flow 
with ease. 
Between the tubes F there are joined to the transverse tubes D the 
longer tubes G, which empty into discharging tubes; on these latter 
there are placed perpendicularly other tubes destined to form little foun- 
tains. These fountains may be provided with stop-cocks. The fish are 
placed in these basins, the water of which is continually renewed, until 
they have reached a certain size. 
In order to prevent the little fish from getting into the faucets by 
which the different basins communicate—which, of course, would very 
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