AHTIFIClAl, H.\T<||IN<;. 81 



I may here venture to juld tliiit tUv tlistiiiguishetl geiillemun 

 I have just named, is incHucd to iiu-n-dulity as ro^jards the exist- 

 ence of a distinct species of I'arr. 



I shall now recur to the cxjaTiincnts on the ov:i of ShIukju ; 

 first, for the purpose of showing; how tliey may he hrou;^ht into 

 direct practical utility, and rendered snhscrvicnt to the plcjujurc 

 of the anjjier, as a method of stoekin^' inland waters ; and, 

 secondly, of pointing out how easily experiments mi^ht In* 

 made in this mode, as to the h\ hiidisation of fishes, and the 

 rciu*ing new species of mules, or iiscertaining that they cannot 

 be reared, by the commixture of the milt and roe of various dis- 

 tinct species of the same family, in small tanks, fed hy rnnninj; 

 brooklets. 



It has been shown above, that the impregnated spawn of any 

 two live brcedin}» fishes of the same family may be artificially 

 luitched and preserved in waters other than those in which the 

 parent species are wont to live ; as even tlie Salmon in fresh 

 water. 



I slmll now proceed to show that the same result may be 

 obtained by the commixture of the milt and roe, in aerati-d 

 water, of dead fishes recently taken. 



It is absolutely necessary that the w ater should be aerated, or 

 hijjhly supplied w ith oxyj;cn. For it is for the purpose of findin|^ 

 water in this condition, that the Salmon, the Shad, the Ihtss, 

 the Smelt, and all those fisli which resort to fresh waters for 

 the purpose of spawninp, run to the shallow, pure, aiul swiftly- 

 flowing briK>ks, to which their rapidity and frecjuent falls impart 

 purity and vitality, by mingling them with the atmospht re. In 

 the same manner, the fish of tlie sea resort for the deposit of 



