Sl'AWNlNC. (\7 



She is now tcrnicil properly a Baj^git, and the- male a Kipper; 

 and the two, generally, Kelts. 



Before enteriii*; the salt water, they linijer awhile in the 

 brackish water of the tide-ways, as they did on ascending the 

 rivers, obtainin};, it is said, thereby a release from certain para- 

 sitical animals, generated, these by the fresh, these by the salt 

 water, at each eliange of waters. 



In Great Britain, the period of the Salmon's spawning varies 

 from November to the i-nd of Jannary. They have been care- 

 fnlly watched during tlu> whole process, as have the eggs ai^cr 

 their deposition, so tliat the length of time which it takes them 

 to attain to maturity is accurately known. This time has been 

 ascertained by Mr. Shaw, in a series of experiments, of which I 

 shall have occasion to speak more fully hereafter, to be about 



1 1 I days, when the temperature of the water is . 'M\° 



mi .lays, l-'i" 



'.•n days, l")'- 



Tlicsc experiments were performed in the open air, and in 

 natural streams, liable to the ordinary influences of the atmo- 

 sphere and weather. 



hr. Knox, however, as is reconhd in the Transactions of 

 the Royal Society of Edinburgh, observed a pair of Salmon 

 which completed their spawning, and covered up their ova with 

 gravel, in the usual way, <in the ^nd of November. This was in 

 one of the nortliern tributaries of the Tweed. 



On the 2.')th of Febnmr)-, or at the end of one hundred and 

 sixteen days, the ova were dug up, and fouTul unchanged. On 

 being rcmove<l, however, at this stage, and placctl in bottles of 



