252 DOMESTICATED TROUT. 



3. Build small ponds for business. 



4. Be able to draw off the water. 



5. Avoid hiding-places. 



6. Protect ponds thoroughly. 



BUILDINGS. 



A full set of buildings or rooms consists of, 



1. Hatching apartment. 



2. Meat apartment. 



3. Store-room and carpenter's shop. 



4. Office. 



5. Ice-house. 



THE HATCHING APPARATUS. 



The hatching apparatus consists of, 



1. Supply reservoir. 



2. Aqueduct. 



3. System of filters. 



4. Hatching apparatus proper. 



THE NURSERY. 



The points to be secured about the nursery are, 



1. A fall of water. 



2. A current. 



3. Protection from suction against the screens. 



4. Security from overflow. 



5. Absence of fixed hiding-places. 



6. Compactness. 



7. Protection against natural enemies. 



8. Perfectly tight compartments. 



