Another very simple method may be arranged in the house. It is a reservoir--a barrel or cask--set perhaps two and a half feet from the floor, and a little hatching trough a few inches lower, into which water gradually runs through a faucet, from the reservoir. This water running through the hatching-box, escapes into a tub a little below. Whatever plan be adopted, great care is necessary in preventing sediment from depositing. Cleanliness is a principal condition of success. The eggs of the trout thus fecundated and deposited in October or November will hatch in the spring. Young trout need no feeding for a month after leaving the egg. There is a small bladder or vesicle under the fore part of the body, when they first come out, from which they derive their sustenance. After this disappears, or at the end of about a month, they should be fed, in very small quantities. Too much will leave a portion to decay on the bottom and injure the water. The best possible food (except the angle-worm) is lean flesh of animals, boiled and hashed fine for the young fish. The flesh of other kinds of fish, when they are plenty and not very valuable, would be very good. These young fish should be kept in the first pond until a year old. Then let them into the second pond, closing the gate after them, to make room for another brood in the first pond. The next year let them into the third, and those into the second that are now in the first, and so on till the fourth. In the last pond, those of different ages will all be large enough to take care of themselves. But sometimes a trout two years old is said to swallow one a year old. But when they get to be three or four years old, this sort of cannibalism ceases. These principles can be carried out in small streams, by constructing gates to keep sections separate, and by forming banks and waste ways for water, with wire gates so high, that the water will not overflow in freshets, and carry the fish away. In taking trout use angle-worms or the fly. A fine light-colored small line is best. They are very shy. The following is a list of other fish, beside the trout, that are well worthy of cultivation:-- _Black Bass._--When full grown, this fish is from twelve to eighteen inches in length. One of the better fish for the table, and profitable to raise in a pond covering not less than half an acre. Chub, being a very prolific little fish, may be kept in the same pond as food for the black bass and other large fish. They are very fond of them. Minnows are the best bait for these fish, though they will bite a trolling hook of any ordinary kind. You may raise them as given for the trout above, or allow them to deposite their eggs in spawn beds of their own selection in their pond. They will do well in water less pure than is demanded for the trout.