We recollect, often when a boy, of trying to catch trout out of the brooks in October, where we could see large, beautiful fish, lying lazily in the places from which we had caught many in the summer, and put our bait carefully on every side of them, and they would not bite. Then we knew not the cause: since studying the habits of fish, we have learned that they never will bite while spawning; with trout, this is done from the 1st to the 15th of October, some few spawning till the last of November. Having caught two fish, male and female, take the female in one hand, and press her abdomen gently with the other hand, gradually moving it downward, and the eggs will be easily extruded, and should fall into an earthen vessel of pure water. Then take the male-fish, and go through the same process, which will press out the spermatic fluid, which should be allowed to fall into the same vessel with the eggs; stir up the whole together, and, after it has stood fifteen minutes, pour off the water, put in more and stir it up, and let it stand as before. This having been done three times, the eggs will be thoroughly fecundated, and are ready to be deposited in the nests for hatching. If the fish are caught before the time of beginning to spawn, the eggs and the spermatic fluid will not be mature, and will be only extruded by hard pressing, and failing to be fecundated, the eggs will perish. The fluid from one male will fecundate the eggs of half a dozen females. These eggs may be hatched in the flumes described above, though hatching-boxes are preferable. The old fish can be returned to the water, and may live many years and produce thousands of fish. These fish, carefully treated and fed, will become so tame as to eat out of your hand, like the "Naiad Queen" of Professors Ackley and Garlick, of Cleveland, Ohio. Among all the hatching apparatus we have seen described, we regard that of the above professors at Cleveland the best. To these gentlemen the country is much indebted for the knowledge derived from their zeal and success in fish culture. At the head of a spring they built a house eight by twelve feet; in the end of the house toward the spring they made a tank four feet wide, eight feet long, and two feet deep; this was made of plank. Water enters the tank through a hole near the top, and escapes through a similar one at the other end, and is received into a series of ten successive boxes, each one a little lower than the preceding one. These boxes were eighteen inches long, eight inches wide, and six inches deep. These were filled to the depth of two inches with clean sand and gravel. The impregnated eggs were scattered among the gravel, care being exercised not to have them in piles or masses. Clean water is necessary, as the sediment deposited by impure water is very destructive to the eggs. If it be seen to be collecting, it should be removed by agitating the water with a goose-quill or soft brush, and allowing it to run off; continue this