ARTIFICIAL HATCHING. 83 



number of young Trout, which had a small bag attached to the 

 lower part of their body, containing a part of the yolk of the 

 egg, which was still their nourishment. In this state they were 

 easily carried from place to place, in confined portions of fresh 

 water, for some days, requiring apparently no food ; but after 

 about a week, the nourishment in their bag being exhausted, 

 they began to seek their food in the water, and rapidly increased 

 in size. As I have said before, Mr. Jacobi assures us that the 

 experiment succeeded as well with mature fish that had been 

 killed for the purpose of procuring the roe and the milt, these 

 having been mixed together in cold water immediately after 

 they were taken out of the body. / have had this experiment 

 tried ttvice/' continues Sir Humphrey, speaking in his own 

 person, " and with perfect success ; and it offers a very good 

 mode of increasing to any extent the quantity of Trout in rivers 

 or lakes ; for the young ones are preserved from the attacks of 

 fishes, and other voracious animals or insects, at the time when 

 they are most easily destroyed, and perfectly helpless. The 

 same plan, I have no doubt, would answer equally well with 

 Grayling, and other varieties of the Sahno genus. But in all 

 experiments of this kind, the great principle is to have a constant 

 current of fresh and aerated water running over the eggs." 



Now it is manifest from this, that any person resident in the 

 near vicinity of any lake or river, abounding in any species of 

 this family, the Common Trout, the True Salmon, the Lake 

 Trout, and probably the Otsego Bass [Coregonus Otsego), which 

 is one of the same family likewise, having also the command of 

 the smallest possible source of fresh running water, can raise, in 

 the space of a few weeks or months, an indefinite number of 



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