ARTIFICIAL HATCBING OP FISH. 103 



the baskets and bags were opened, and tbe young 

 fry appeared as numerous in tbem, as from that 

 which had been left free in the gravel. In one set 

 of the baskets not above five per cent, appeared un- 

 productive ; and hence Sir Francis' conclusion can 

 scarcdy be disputed, that the breeding of Salmon or 

 other fish in large qurjitities is, comparatively speak- 

 ing, easy ; and that millions may be produced, pro- 

 tected from every danger, and turned into their 

 natural element at a proper age. (Ann. & Mag. of 

 Nat. Hist., viii. 166). — Mr. Shaw, as is well known, 

 has long and successfully carried on this artificial 

 process in his highly interesting investigatione on 

 the growth of SaJmon at Dnimlanrig. Conceming 

 the common. Trout, Mr. Gottlieb Boccius gives, in a 

 few wordsj the following directions ; '* Take one of 

 the boxe^ I have d^cribed under the head of Stew- 

 boxes, ar.d fill the bottom with clean good gravel, 

 not too iarge; in the month of November, or a 

 month before Spawning, place in the box a Spavnier 

 and a Milter of good size, then sink it in a deep 

 stream, where there is plenty of water ; and wher 

 the fioh have cast, take them out and twrn ihevf^ 

 adrift into the river : then move the hon into shal- 

 low water, which, being influenced by the rays of 

 the sun, will early bring forth the fry : keep thsm 

 in the box until they are about half an inch long^ 

 and then turn them out on the shallows." (Treat, on 

 the Management of Fresh- water Fish, 19).— It is 

 with Trout that the experiment has puccea«fully been 

 carried on in ,Bolgiuui, lu Uie l«uge establishment of 



