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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 evenly 

 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 so short that there is no trouble in their man- 

 agement, and they maybe 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 

 adhered 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, once in two or three days is quite 

 sufficient, 



