226 APPENDIX. 



ova, escaped tlirougli holes at the bottom of tlie 

 box. Upon its being opened, the ova appeared 

 perfectly healtby, but there were more dead ones 

 than in the first box, occasioned perhaps by the 

 pressure of the moss, which being constantly kept 

 wet may have expanded, and thus occasioned more 

 pressure than was good. The temperature in this 

 case was about 33°. After being carefully ex- 

 amined, it was replaced, not to be opened again 

 until a further lapse of thii'ty days. — J. Youl. 



"March 4, 1863. 

 *' The Editor of * The FieW.'" 



Mr. Youl kindly gave me some five or six of these 

 eggs, which I placed in my hatching-boxes, but they 

 all died. Mr. Johnson also had some eggs, and met 

 with a better result, for he reports — 



" Two hours after lea^dng the Wenham Lake 

 Ice Company's offices, on the 3rd instant, I de- 

 posited the ova taken from each box in a small 

 earthenware dish, containing moss and water, with. 

 two small jets of running water at a temperature 

 of 46°. Before depositing the ova, I took one dead 

 ovum from those taken from the first box. On the 

 following morning two more from amongst the same 

 lot. The remainder of the ova are apparently 

 lookino^ well. The temperature of the water varies 

 from 40° to 46°." 



We continued our observations, and on March 

 25th, examining again the condition of the ova in 

 the boxes, Mr. Youl writes : — 



" Sir, — Yesterday, the two boxes of salmon ova 

 which had been opened and looked at on the 3rd 

 instant, and referred to in your journal of the 7th, 



