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shells, then we place them on trays in the troughs. As 

 they remain much longer in the boxes than in the troughs 

 less room is needed in the latter than would be required 

 if they were entirely hatched there. We give them a 

 good current, and as soon as they are hatched and the 

 egg shells removed, we spread gravel over the bottom of 

 the troughs, or remove them to troughs with gravel on 

 the bottom, as we believe they are more contented, so 

 long as "the umbilical sac remains, if they can hide their 

 heads, or imagine that they are hid between the 

 stones. We observe that if they are kept at this 

 stage in bare troughs they are uneasy and keep strug- 

 gling about from place to place. Just before the sac is 

 absorbed we watch them carefully, especially the brook- 

 trout, to prevent their crowding on one another, and 

 when they do so they are removed in a broad flat net 

 from the head of the trough where they congregate to 

 the lower end, or are otherwise spread out. This is 

 done at night as well as during the day when there is a 

 large number together. As soon as the sac is absorbed 

 we remove the gravel and keep them in clean troughs 

 with nothing in them to catch or conceal dirt. We 

 again increase the current and feed the young six 

 times a day on liver comminuted to the utmost possi- 

 ble degree, and diluted with water. We distribute the 

 fry as soon as possible thereafter, and put them in the 

 smallest spring runs connected with the streams or ponds 

 they are to etock, and not directly into the ponds or 

 streams themselves. 



