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tray, and the milt, as soon thereafter as possible, then a 

 little water should be added, just enough to cover the 

 tray, and the whole shaken about till the eggs are evealy 

 distributed. A few minutes expire before they adhere 

 finally, but when adhesion once takes place they must 

 remain undisturbed till they hatch. The time of devel- 

 opment is BO short that there is no trouble in their man- 

 agement, and they may be hatched in unlimited numbers. 

 The spawners may be stripped directly into a shad hatch- 

 ing box and that left in the current of the river, and a 

 large number hatched in an ordinary fish ^car, in which 

 the parents had been confined to mature their eggs and 

 in which they had spawned of themselves. The trays 

 are removed to ^the hatching boxes after the eggs have 

 adherpd by the hardening of the mucous matter that sur- 

 . rounds them and then treated like trout eggs except that 

 the dead fish cannot be removed. 



Whitefish. — We have received the following com- 

 munication on the hatching and raising of whitefish. 

 No one has had greater experience or success with this 

 peculiarly delicate and difficult variety of fish than the 

 writer, and whatever he says on the subject may be 

 regarded as authority : 



Madison-, Wis., June 22d, 1878. 

 Dear Sir : 



My experience in hatching whitefish, coregonus albus, is 

 that the first and most important thing to insure perfect success is 

 to get the eggs well impregnated. 



2d — To use great care in transporting them from the fisheries to 

 the hatchery. 



3d — To give them a good circulation of water. 



4th — To use lake water or water of same temperature. 



5th — To employ sufficient help to remove all dead or unimpreg- 

 nated eggs every day for the first thirty days after they are placed in 

 the hatching boxes, after that time, oiice in two or jhree days is quite 

 sulBcieht, 



