CONTENTS. 



CHAPTER I. INTRODUCTORY REMARKS ON FISH CULTURE. 



What it is. Its advantages over natural propagation. Time 

 occupied in hatching. Number of ova of different species. 

 Consequences of all the ova "producing fish that would come to 

 maturity. Object of Fish Culture. Its antiquity. Practised by 

 the Chinese and Romans. Artificial propagation discovered by 

 Dom Pinchon. Rediscovered by M. Jacobi. Subsequent dis- 

 *covery of Joseph Remy. Alleged discoverers. Experiments 

 of Shaw and Young. Patronage of the French government. 

 Its effects on Scotch and Irish rivers. Its use as an adjunct in 

 restoring American rivers to their former fecundity. Commis- 

 sioners of Fisheries appointed by the New England States, and 

 the States of New York and Pennsylvania. Experiment in arti- 

 ficial propagation and hatching at Holyoke on the Connecticut. 

 Experiments in trout breeding by Stephen H. Ainsworth. 

 Progress in trout culture. Fish culture in France . P. 13 



CHAPTER II. TROUT BREEDING. 



The Trout, Trout Ponds, etc. 



The Trout. Its adaptability to culture. Season of spawning. 

 Spawning grounds. Appearance of the sexes at spawning time, 

 habits and condition. Subsequent recuperation. Water-supply. 

 Effect of the temperature of water on the time of hatching. 

 Spring water necessary for incubation. Series of Ponds. Their 

 shape. Method of shading them. Raceways. Their construc- 

 tion. Protection of them from muskrats. Screens. Depth and 



