Tur Napoieon Fisu-1aTouer. 403 
in streams to hatch the fecundated ova by Lieut. Jacobi or 
Joseph Remy. Messrs. Furman and Ainsworth being both 
gentlemen of leisure, who devote their time to fish-culture 
pro bone publico and for their love of the subject, much ben- 
efit may therefore be reasonably Se from their experi- 
ments in water-farming. 
“ GENERAL DIRECTIONS,” BY SETH GREEN. 
For the general management in propagating salmon and 
trout, and the transportation of fecundated ova and the ale- 
vins, the following advice, founded upon successful experi- 
ment and entirely reliable, may be read with interest by 
those who are about to commence fish-culture by artificial 
assistance : 
“Build your ponds according to the amount of water you 
have. If you have but little, build small. The water should 
be changed every 24 or 48 hours, and the oftener it changes 
the better. The trout can be very plenty if they have suffi- 
cient fresh water and food. 
“T can send ova a fifty days’ journey packed in a box with 
moss. I place the moss in a tin pail, filled with sawdust, so 
that the spawn will not feel the changes of heat and cold. 
“Directions for handling the Spawn.—Pick the moss care- 
fully off from the top of the spawn. Then put the box in : 
pan of water and turn it nearly bottom-side up, and pick the 
moss out very carefully. The spawn will sink to the bottom, 
and you can pick the moss out of the pan. Ifthere is a little 
left it willdo no harm. Then pour the spawn in your hatch- 
ing-trough by holding the edge of your pan under water, and 
‘place’ them, without touching the spawn, by agitating the 
water with the bearded end of a feather. The dead spawn 
will turn a milk-white color, and should be picked out. Your 
trough should be so arranged that the water will run in it 
about twelve feet per minute. The water should be filtered 
by running through gravel or cloth screens, to prevent the 
sediment from reaching the spawn. Irun about one inch of 
