5d 
From 1872 to 1874 I lived in France—two years lost 
to my pisciculture. On my return I had to begin over 
again; but as I felt sure of my method, I again set to 
work, and my establishment soon reached the high state of 
perfection which it had occupied prior to my visit to France. 
The stone basin (mentioned already in my report for 
July, 1872) proved a great success. It produces on an 
average of 1,200 trout every year, and the open-air basins 
contain young fish by the thousand, more or less, accord- 
ing to the zeal and the efforts of the various fishermen in 
whose charge they are. The food is always the same 
during the first two months, small shrimps assorted, fur- 
nished two or three times a day; later, small shrimps 
such as are gathered with small purse-net attached to the 
end of a stick, at the sources of brooks, and in the large 
basins; for these crustaceans multiply wherever the water 
of the Devil Rock Brook is found. 
Although trout placed in rivers consume an enormous 
quantity of these small shrimps, a great many remain 
attached to cresses and other aquatic plants. The posi- 
tively prodigious quantity of small shrimps in the lake, 
the sources of the brook, and the large basins has so far 
not allowed me to think of raising these crustaceans in 
the rivers, and saves the trouble of transferring the trout 
alternately from an exhausted river toone still containing 
many of these small shrimps. 
Our young fish remain in one place from March to 
September, and they are fed two or three times a day, as 
their needs seem to require it; and it is a curious spec- 
tacle to see them in dense masses pursuing their living 
prey. The quantity of small shrimps given to the fish 
two or three times daily weighs 5 kilograms (about 11 
pounds). Having carefully counted the number of 
shrimps contained in 5 grams (about ¢ ounce), and found 
this number to be 672, the total quantity of shrimps fed 
to the fish in a single day is not less than 672,000, or 
4,704,000 per week. 
