SALMON 31 



by the milt of the male, and the spawn in this state 

 was transferred to a private pond previously pre- 

 pared for its reception. That there might be no 

 doubt as to the species, the skins of the parent 

 Salmon were kept, and may be seen at any time. 



On the 28th of April, 114 days after impregnation, 

 the young Salmon were excluded from the egg, which 

 was not the case when they were visited the pre- 

 ceding day. On the 24th of May, twenty-seven days 

 after being hatched, the young fish had consumed 

 the yolk which remains attached to the lower part 

 of the body, and which serves him for nourishment, 

 and the characteristic bars of the Parr had become 

 distinctly visible. From a deposition of mud, as Mr. 

 Shaw apprehends, all these fry, except one individual, 

 were found dead at the bottom of the ponds, so that 

 there was no opportunity of watching their future 

 progress ; but an ingenious experiment was made, 

 which proved that an increased temperature hastened 

 the development of the infant fish. 



But we shall see that Mr. Shaw was too indefati- 

 gable to be daunted by such an untoward accident, 

 and. that he persevered in his experiments, till his 

 efforts were rewarded by complete success. 



On the 27th of January, 1837, he captured a male 

 fish of sixteen pounds, and a female of eight, and 

 expressed the ova of the female and impregnated 

 it with the milt of the male in the manner above 

 related, and deposited the spawn in this state in a 

 private pond as before, and to which no fish could 

 by possibility have access. 



" On the 2ist of March," says Mr. Shaw (that is, 



