TABLE OF CONTENTS. 



Page. 



1. Scope of the paper 945 



2. Water 946 



3. Site 948 



4. Dams and Conduits 949 



5. Aeration 950 



6. Filtering 952' 



7. Hatcliing-trongbs and fittings 954 



8. Wire trays 957 



9. Arranging the trays for ^york 959 



10. Capacity of the troughs 961 



11. Screens 961 



12. Treatment of the eggs 962 



13. Treatment of the fish 964 



14. Conclusion 965 



966 



