APPENDIX. 121 



iron tanks brought with it to the trays, and de- 

 posited on the Ova, so considerable a quantity of 

 that metal, in the form of a fine powder, as to 

 cause the death of great numbers of them before a 

 remedy could be supplied. The remedy consisted 

 in causing the water to pass through a filter before 

 it reached the trays. 



The use of wooden tanks, lined with block tin or 

 slate, would effectually prevent future disaster from 

 a similar cause. 



The Commissioners have learned that some of 

 the Ova were several weeks old when first placed 

 on the trays. They notice this fact more with 

 reference to any future experiment that may be 

 undertaken than to that which has just terminated. 

 They are of opinion that every precaution ought to 

 be taken to retard the hatching of the Fry during 

 the voyage, and that, as one important means of 

 obtaining this end, the Ova when embarked should 

 not be more than a few days old. 



Mr. Eamsbottom appears to the Commissioners 

 to be thoroughly acquainted with the duty he 

 undertook to perform, and to have discharged it 

 with much diligence and zeal. 



They believe that if another effort of the same 

 nature should be made, it could not be confided to 

 a more efficient agent, or one more likely to ensure 

 a successful result. 



