VERMONT AGRICULTURAL REPORT. 



107 



during the latter stages of development. There will, of course, 

 be no sediment because you have selected a water supply that is 

 free from it, but, if through some unforeseen accident the eggs 

 become coated with sediment to such an extent that you cannot 

 distinguish the eye spots, they should be cleaned by pouring them 

 off into the large square pan and rinsing them by the same process 

 as when they were unpacked. A quick turn of the tray over the 

 pan of water will empty it without the loss of an egg. Wash the 

 trays thoroughly before returning them to the troughs and brush 

 out all sediment in the troughs. Use a cloth or soft brush to 

 wash trays as the asphaltum paint is easily scratched off. 



Development of Trout Eggs and Fry. 



When the fry begin to hatch, they burst the shells of the 

 eggs and emerge tail first, wriggle themselves out and pass 

 down through the wire meshes to the bottom of the trough. 

 As soon as all the eggs have hatched, the trays can be removed. 

 The egg shells must be feathered out to the lower end of the 

 trough and finally brushed out over the tail screen, care being 

 taken not to injure or brush out fry at the same time. Cripples, 

 deformed ones and dead from unknown causes will be picked 

 from the trough daily by use of the small scarf net and pickers. 

 The eggs develop first into fry with an abnormally large 

 stomach, called the umbilical sac, which is their "bread basket." 

 This sac is gradually absorbed until the fry appear like the one 

 illustrated with almost no sac at all. At this period or soon 



