DIFFERENCE OF GROWTH IN FISH. 163 



suits of practical experience, and which gives 

 illustrations of many matters which will be 

 useful to the experimenter.* The columns 

 of " The Field " also abound with correspon- 

 dence on this matter, and they are always 

 open to information and discussion on this 

 and other matters relating to fish breeding 

 and angling. 



Whether the young fish be retained in the 

 boxes, turned into a ditch, or kept in ponds, 

 it will always be remarked that some indivi- 

 duals grow more rapidly and attain a greater 

 size than others. As a remarkable example 

 of this fact, I give an instance. f 



* Natural History of the Salmon, as ascertained by the 

 recent experiments on the artificial spawning and hatching of 

 the ova, and rearing of the fry, at Stormontfield, on the Tay. 

 Thos. Murray and Son, Glasgow ; Paton and Ritchie, Edin- 

 burgh ; Arthur Hall, Virtue, and Co., London. Price 2s. 6d. 



t See "The Field," April 25, 1863. 



M 2' 



