TEOUT 



debris. I have never tried the experiment my- 

 self, and so cannot speak from experience. 



Dead ova should be always removed at once, 

 and the hatching trays should be gone over 

 carefully once or twice a day to see if any are 

 present in them. Dead ova are easily recognized 

 from the fact that they become opaque and 

 white. They are best removed with a glass tube. 

 The thumb is placed over one end of the tube, 

 and the other end brought directly over the dead 

 ovum. When the thumb is removed from the 

 end of the tube held in the hand the water will 

 rush up into the tube, carrying with it the dead 

 ovum. The thumb is then replaced over the end 

 of the tube, which is lifted from the water with 

 the ovum retained in it. This tube may also be 

 used for removing any extraneous bodies which 

 may get into the trays or boxes. 



A form of fungus known as Byssus grows 

 upon dead ova, and it is principally for this 

 reason that they must be removed. Livingstone 

 Stone says of Byssus: "With trout eggs in 

 water at 40 or 50 Fahrenheit, it generally 

 appears within forty-eight hours after the egg 

 turns white, and often sooner, and the warmer 

 the water the quicker it comes. It is never 



37 



