68 FISH CULTURE. 



assistance to hold the tail. Of course the saime 

 method of treatment, as regards the spawn, is em- 

 ployed to both trout and greyUng, as I have already 

 related. 



As it is often desired to hatch ova, not only in- 

 doors, but in a sitting-room, for purposes of study and 

 inquiry rather than the stocking of fisheries, T offdr 

 the plan of an apparatus suitable for this purpose. 

 The annexed cut is not a very elegant form of appa- 

 ratus, still it has the recommendation of convenience. 

 It makes no mess, and takes up very little room ; a 

 mere drip of water is all that is required, as two or 

 three hundred of ova would be as many as would be 

 necessary. 



All that is required is a small cistern^ capable of 

 holding a few gallons of water, with a small stop'- 

 cock to regulate the supply. Around this cistern may 

 be coiled, as it were in lengths, a small permanent 

 gutter, or way, about an inch or two in width, and 

 neatly gravelled. On this the ova can be deposited. 

 Each coil or length, of course, must be lower than the 

 other ; and, supposing the apparatus to be square, a 

 little faE could be contrived at each corner. This 

 coil or gutter, after passing two or three times round 

 the cistern, should end in a water tank ; and if the 

 water tank be surrounded with a cooler, and furnished 



