CKAIGEND HATCHING-ROOM. 



147 



for observation without disturbing any of the ova. They also 

 ensure absolute security from fungus. Figs. 105, 106, 107, show 

 a plan and sections of the slate and glass grille. 



FIG. 105 scale }. 



FIG. 106^ scale J. 



FIG. 107 scale J. 



A slate trough was placed against the wall for fry or yearling 

 fish, the supply obtained from the tap. The outlet screen was 

 No. t 8 perforated zinc fixed in a groove in the slate. Figs. 108 

 to 1 1 1 show a plan and sections of the slate trough. 



FKJ. 108 scale ^ 3 . 



JJ 



= 



FIG. 109 scale 



FIG. 110 scale ^. 



