28 FISH CULTUBE. 



where a new fish (the greyling) was introduced. A 

 fuller account of these operations will be found in 

 the Appendix. The first of these experiments was 

 conducted under Mr. Eobert Buist, the second under 

 Mr. Eamsbottom, and the last under Mr. Eyre, who 

 is better known as the inventor of an ingenious 

 machine for the transport of live fish to long dis- 

 tances. 1 In the two former instances boxes were 

 used which were three-parts filled with gravel the 

 salmon ova being deposited in them; in the latter, 

 boxes were thought objectionable, and the natural 

 bed of the stream was preferred and the greater part 

 of the ova of the greyling was accordingly deposited 

 in the gravel (a short account of this operation was 

 published in the Field by Mr. J. Briggs ; a short extract 

 from it will be found in the Appendix). In a con- 

 versation I had with Mr. Eyre concerning the natural 

 bed of the stream and boxes, he stated it to be his 

 opinion that the ova throve better under the above 

 conditions, i. e. in the bed of the stream, because he 

 imagined that there were certain gases percolating 

 through the gravel below, which were very beneficial 



1 To these cases may be added the experiments of the Thames 

 Angling Preservation Society, in adding to the stock of trout in these 

 waters by artificial propagation, this process having been carried 

 out at Hampton, under the supervision of my friend, Mr. Stephen 

 Ponder. 



