FISH HATCHING ON A MODEST SCALE 435 



firming the dispatch of the ova. The further career 

 of the purchased eyed ova from that stage onwards 

 will follow the lines already described in the foregoing 

 pages. 



It may be of interest to add that at Luss the only 

 difficulty of collecting ova from salmon, sea-trout, and 

 fario has been caused by untimely floods. In four out 

 of the seven seasons during which the hatchery has 

 been in operation, the ova treated have been supple- 

 mented by consignments of eyed ova from Howietoun 

 and the Solway Fisheries Co., at Dumfries, represent- 

 ing approximately 596,000 fario ova. In the seven 

 seasons an approximate total of 1,611,000 ova of all 

 species has been treated, of which 1,576,000 have been 

 reared and distributed as healthy fry. 



The whole hatchery arrangements were designed 

 by Mr. Thomas Duff, I.M., Glasgow, a member of 

 the Loch Lomond Angling Improvement Association. 

 Its practical management has been in the competent 

 hands of Mr. Walter M'Diarmid, Luss, from the 

 beginning. 



NOTES BY EDITOR 



The Royal Commission on Pollution of Rivers have 

 made some interesting experiments at Coleburn, Banff- 

 shire, with distillery effluent. The operations were 

 conducted under the direction of Mr. Littlefield, with 

 the view to avoid pollution of the river Spey. 



