had to take its chances when turned out, it should be protected 

 until it needs food ; besides this, fungus will destroy many eggs, 

 as will also the sun and sediment. 



Mr. Clark related an experiment made by the late George 

 Clark, once one of the Board of Michigan Commissioners, 

 when his (the speaker's) father was taking whitefish eggs at Mr. 

 George Clark's fishery at Ecorse, on the Detroit river. The 

 latter gentleman wished to test the planting of eggs, and made 

 a box with screened sides and put gravel on the bottom, and 

 placed the eggs on the gravel and sunk the box where there 

 was a gentle flow of water. In February the box was taken 

 up and there were no good eggs to be found in it, those which 

 died first had developed fungus, and this had spread and killed 

 every egg. Fungus is a deadly thing which is not allowed to 

 appear in any hatchery which makes^ pretension to be well 

 conducted. 



Dr. Sweeny explained that while the black bass and the 

 sunfishes guard their eggs and keep off all intruders the trout 

 and whitefish, in fact all members of the Salmonidae, left them 

 to their fate, and here is where man steps in as a guardian and 

 prevents destruction at the most critical period. 



CO-OPERATION IN FISH-CULTURE. 



BY JOHN H. BISSELL, OF THE MICHIGAN FISH COMMISSION. 



Within the limits properly allowed for a paper in a meeting 

 like this, it is scarcely possible to do more than sketch or out- 

 line a subject such as I have chosen. I am consoled, however, 

 with the reflection that the manner and style will be passed 

 with indulgence if only there be some merit in the subjects 

 presented for consideration, or at least good faith on the part 

 of the reader. 



I think it is generally agreed, that fish-culture has passed 

 its purely experimental stage. It is in fact fast becoming 

 recognized as a practical art, and an established department of 

 civil government, its definitely ascertained results, which are 

 now unquestioned, fully warranting the recognition it has 



