CONTENTS. 



CHAPTER I. — ^Inteoductoet Eemaeks on Fish Cttltuee. 



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 th.e 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 n.— Teodt Beeeding. 



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 



