FISH-CULTURE. 277 



remarkably well. The number would be about 5000, as the eggs 

 were very small. This shows that partial freezing after the egg is 

 eyed is not necessarily fatal if the eggs are frozen in air. 



The eggs in Box I. at Howietoun, which had been spawned on 

 the 8th November, eyed on 20th February, being 104 days. 

 These eggs afterwards hatched on the 17th April, being 160 days. 

 This is the longest record in my experience, and the eggs hatched 

 uncommonly well, being almost entirely hatched out on the morn- 

 ing of 18th April, sixteen hours after they were laid down to 



hatch. 



On the 22d February I put the first advertisement of the 

 Fishery in the Field. (See Appendix.) 



This spring herons began to be very troublesome, and, in spite 

 of guns and traps, their numbers have increased steadily with the 

 extension of the Fishery. By the 6th March the fontinalis alevins 

 were all herding together, forming one of those useful co-operating 

 breathing societies in which the combined movement of thousands 

 of pairs of pectoral fins induce a current through the whole mass. 

 On the same day I drew the valve of the east 300-feet earth pond 

 (No. 10), and it took five hours to empty. In spite of the cold 

 winter, the two-year-olds were well on the feed, and I killed the 

 second horse for the season. On the 1 2th March I observed several 

 large trout spawning in the feeder to the east 130-feet wooden 

 pond (No. 6), and on the 18th March I netted the pond, and 

 obtained 50,000 S. levenensis ova. The eggs were slightly smaller 

 than those obtained in October from the three-year-old S. leven- 

 ensis in the centre 130-feet wooden pond (No. 7), but were of a 

 richer amber colour. Milt was easily obtained, and of the con- 

 sistency of thin cream. The temperature of the air was about 

 40 F., and deep snow formed a very convenient carpet to turn 

 out the landing-net on. The trout were about thirty-six months 

 old, and some of the males scaled fully 1^ Ib. Most of the eggs 

 were sent to Middlethird hatching-house, as a second stocking, 

 and they hatched on June 15th, probably the latest date on record 

 in this country. On the 25th March I corrected proofs of the first 

 price list of the Fishery. (See Appendix.) On the 2d April I 



