468 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [2] 



Page. 



42 

 G. Ditches for the superfluous water ^,^ 



7. Arraugements for letting the water in and out ' 



A. Weirs with locks *. 



B. Water-pipes , j. 



, C. The stand-pipe ^ 



D. The tap-exit ^ i 



E. The grates 



III.—FlLUNG TIIK PONDS WITH WATER. 



52 



1 . How is the pond to be filled ^^ 



2. The proper time for filling ponds 



IV.— Fish-culture. 



r.4 



A.— Carp-culture r„ 



1. Spawning ponds ^^^ 



2. Raising ponds ' 



3. Stock ponds 



T . . . Ol 



4. Winter ponds 



fj. The relative size of the dift'erent classes of ponds "- 



6. General rules as to the stocking of ponds Jjj 



7. Stocking of the spawning ponds and production of young fry 7o 



8. Stocking the raising ponds 



!). Stocking of the main or stock ponds ™ 



)0. Care of the fish, especially the carp ^'^ 



a. Keeping the dikes in good repair ^^^ 



h. Keeping the water at a proper height 



c. Cleaning out the mud ' 



d. Sickness and death among fish ----- 



e. Improving the food-producing capacity of the ponds by artificial 

 »n«a°s 



/. Feeding carp artificially " 



g. Supervision of the i)ondfi 



11. The wintering offish " 



R._-The culture of some other kinds of fish ~ 



1. The tench J^^^ 



2. The crucian " 



3. The pike ^[^^ 



4. The pike-percli ' 



.^). The perch 



G. Thesilnrus " 



7. The loach [' 



8. The golden ido - "~ 



9. The goldfish : J;J"^ 



10. The brook trout ' 



11. Salmon, sea tiout, and lake trout 



12. The various kinds of Coregonus ' 



13. Theeel 



V. — The pond fisheries. 



140 

 Letting off the water 



Various other preparations for the fisheries 



Spawning-pond fisheries 



Raisin o-pond fisheries 



•^ \. , . 147 



Summer fisheries 



Winter fisheries 



