SECOND DAT.] BREEDING OF FISH. 71 



of the body, and it is only necessary to pour the 

 spermatic liquor from the milt upon the ova in water. 

 Mr. Jacobi, a German gentleman, who made many 

 years ago experiments on the increase of trout and 

 salmon, informs us, that the ova and milt of mature 

 fish, recently dead, will produce living offspring. His 

 plan of raising trout from the egg was a very simple 

 one. He had a box made with a small wire grating 

 at one end in the cover, for admitting water from 

 a fresh source or stream, and at the other end of the 

 side of the box there were a number of holes to 

 permit the exit of the water : the bottom of the box 

 was filled with pebbles and gravel of different sizes, 

 which were kept covered with water that was always 

 in motion. In November or the beginning of Decem- 

 ber, when the trout were in full maturity for spawning, 

 and collected in the rivers for this purpose upon beds 

 of gravel, he caught males and females in a net, and 

 by the pressure of his hands, received the ova in a 

 basin of water, and suffered the milt to pass into the 

 basin; and after they had remained a few minutes 

 together, he introduced them upon the gravel in the 

 box, which was placed under a source of fresh, cool, 

 and pure water. In a few weeks the eggs burst, 

 and the box was filled with an immense number of 

 young trout, which had a small bag attached to the 

 lower part of their body containing a part of the yolk 



