340 Third Annual Report of the 



The collection of eggs in Kenka Lake was finished on Decem- 

 ber 9, 1912. The whole number of lake trout caught was 278, 

 and the number of eggs obtained was 102,400. 



For separating dead eggs of lake trout from the live eggs 

 Superintendent Thayer, of the Bureau of Fisheries Station at 

 Northville, Mich., uses salt solution prepared by thoroughly dis- 

 solving one pail of Diamond Crystal table salt in eight pails of 

 clean, clear water and then bringing the density of the mixture 

 to 34 degrees. This offers a very expeditious and economic method 

 of removing the spoiled eggs. The same solution might be used 

 for trout eggs of other species ; but the density of the solution 

 would have to be varied to suit the particular kind of egg under 

 treatment. Mr. Thayer believes that brook trout eggs would re- 

 quire a density of about 32 degrees. 



In operating with this solution, Mr. Thayer uses three six quart 

 cans one of which is filled about two-thirds full of the solution ; 

 into this is put one tray of lake trout eggs; an empty tray is 

 placed across the top of each of the two remaining empty pans, 

 and as soon as the dead eggs have floated they are poured onto one 

 of these trays which allows the solution to pass through into the 

 pan below ; as soon as the dead eggs are removed the live eggs are 

 poured onto the remaining empty trays and the balance of the solu- 

 tion will pass into the third pan ; the live eggs are then immedi- 

 ately placed in fresh running water ; the two partially filled pans 

 of solution are combined into one pan and the process repeated 

 for each tray. 



The Whitefishes and Their Kindred 

 The whitefishes, lake herrings, or ciscoes and the tullibees are 

 now all included in a sub family of the salmonidae or salmon 

 family. In Xorth America, according to the latest literature, 

 there are now 32 species of the sub family, and of these 12 at 

 least occur in Xew York waters. 



The whitefishes are best known popularly by the two large 

 species occurring in Lake Erie and Lake Ontario. One of these 

 is common in all the Great Lakes except Erie, and it abounds in 

 many Adirondack lakes. The distribution of both of these large 

 fishes has been much extended by artificial culture. 



