54 
that not only was the loss smaller, but the young fish 
kept in this basin developed more rapidly than the 
others. When, in September, I transferred the young 
trout to more extensive waters, those which had come 
from the stone basin gained on the others in every 
respect. 
In places where there is clear and cool water contain- 
ing some lime, and where the freshwater shrimp repro- 
duces naturally, I have discovered the best method of 
raising salmonoids. It therefore gave me great pleasure 
to read that at the Gremaz establishment Messrs. Lugrin 
and du Roveray had succeeded in solving the problem of 
raising young fish by the same means which I had em- 
ployed here, and which I had described in the report 
which I had the honor to submit to the Acclimatization 
Society in July, 1872. 
The closer we follow nature, the more certain we are 
of success. It may give an artificial pleasure to see a 
few young fish in a hatching-basin and to watch the 
absorption of the umbilical bag; some of them may even. 
be kept for some time on more or less expensive arti- 
ficial food; but when it comes to pisciculture on a large 
scale, when the object in view is to stock large sheets of 
water, these means are insufficient. 
I well remember a long conversation I had with Car- 
bonnier. He told me in a firm and convincing manner 
that, as I had on my property at Piedra a watercourse, 
which was always cool and limpid, and which had a con- 
siderable fall, I should abandon the Coste and all similar 
apparatus, and use the Jacobi box, placing it to half its 
height in the water (natural method), and, as‘I had large 
quantities of small shrimps, to give my fish small shrimps 
(natural food), and not think of any other food. I fol- 
lowed his advice, and my season of 1871-72 was so 
remarkable that the Acclimatization Society rewarded 
me with the large gold medal at the public session of 
April, 1873. | 
