CHAPTER XVIII. 



FISH-BKEEDING. 



Causes of the decrease of Salmon and Trout. — Remarks on fish-ponds and 

 the manner of stocking them. 



Artificial Fish-Breeding — with illustrations, showing the manner of 

 expressing the ova and milt, the arrangement of hatching-troughs, and 

 the growth of the fish ; from " A Complete Treatise on Artificial Fish- 

 Breeding,'' by W. H. Fry, Esq., with some remarks of the author of 

 this work. 



The Aquarium — its appropriate size and form, and manner of stocking it 

 with fish and introducing suitable aquatic plants. 



Eemaeks on Fish-Ponds, and the manner of PEODUC- 

 ING AND REARING FiSH IN A NATURAL WAY. — All " true- 

 hearted anglers," (we thank Dr. Bethune for the word), who 

 have witnessed the ruthless and indiscriminate destruction 

 of game-fish, will take an interest in the plans proposed and 

 the means now happily adopted for their increase. Many a 

 fly -fisher who travels a long way to enjoy his favorite sport, 

 is shocked at witnessing the wilful extermination of Salmon 

 and Trout. The former by spearing, netting, and erecting 

 . high dams without providing for their free passage up and 

 down — the latter by snaring them on their spawning-beds, 

 catching them in seines and eel-weirs, and drawing off mill- 

 ponds. On Trout-streams there are still other agencies at 

 work. The coal-mine poisoning the brook with sulphur ; the 

 saw-mil) filling it with slabs and saw-dust ; the factory with 



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