APPENDIX. 263 



from. If, for any reasons, it is preferred to experiment 

 witli tlie young, the smallest should he chosen, and they 

 should he placed in wooden or earthenware vessels ; the 

 latter would he preferable, and those having a capacity of 

 from ten to fifteen gallons would perhaps be best, but tubs 

 or casks, when perfectly clean, may be used. The recep- 

 tacle, whatever it may be, should be suspended, in order to 

 avoid the disturbance of its contents by the incessant roll- 

 ing of the vessel, such motion being prejudicial to the 

 welfare of the fishes. The fishes should also be fed, and a 

 supply of suitable plants should, therefore, accompany 

 them. I may conclude with a translation of the specific 

 instructions of M. Coste, from whom, indeed, I have de- 

 rived the hints above ofiered : — 



" 1. Very young fishes should be selected. 



" 2. These fishes should be distributed among sev,eral 

 receptacles. 



" 3. Care should be taken not to crowd too many together 

 in one receptacle. 



" 4. The water should be renewed partially or entirely 

 whenever it becomes necessary 



" 5. It should also be aerated from time to time. 



" 6. The fishes should be fed whenever they shall seem 

 to require it. 



" 7. The remains from the food which has been given to 

 the fishes should be carefully taken up from the bottom of 

 the receptacle, and removed within eight hours after feed- 

 ing; the dejections and other impurities which would in- 

 jure the water should also he removed. 



" 8. Finally, the several receptacles should be kept in 

 different places, and under various conditions." 



