72 AMERICAN FISH CULTURE. 



inch, and such contrivance (which I adopted at my place 

 in Warren county, New Jersey) will meet the case. 



Transportation of Fry. A large number of young 

 may be transported in a few cubic feet of water. A short 

 time after they commence feeding, I have no doubt that ^ 

 thousand or fifteen hundred might be sent off in twenty 

 gallons, if care is taken to renew the water, as I have re- 

 marked on transporting adult fish. A hundred might be 

 taken in a jar holding a gallon, if the water is kept cool and 

 aerated. On one of the plates of the Massachusetts Fish 

 Commissioners' Report for 1867, is figured a tank a-fourth 

 wider at the bottom than at the top, with a pump inside 

 for oxygenating the water. It is an excellent contrivance 

 for conveying either young or old fish. Care should be 

 taken that the vessel in which the fry are carried is free 

 from any strong taint. A new red-cedar bucket for in- 

 stance might prove fatal to them.* 



According to the system of rotation in occupying the 

 ponds as already given, pond No. 1 will be vacated by the 

 latter part of summer. The fry should then be admitted 

 from the nursery, care being taken that none remain behind. 

 If any should linger they will become attenuated and ill- 

 favored from lack of food, and may, if they survive, be 

 hungry devourers of the fry next season. 



*I this day (May 28th 1868) noted a great disparity in the size 

 of the fry in Mr. Comfort's troughs and nursery, the largest being 

 at least four times the size of the smallest. Mr. C. assured me he 

 has seen within a few days, the larger endeavor to swallow their 

 smaller brethren of the same brood, and supposes they have suc- 

 ceeded in their efforts in some instances. 



