290 On the Introduction of Salmon into Tasmania. 



injury, to nursing ponds prepared beforeliand. Ground 

 ought therefore to be enclosed and ponds excavated, in 

 anticipation of such arrival. The ponds should be connected 

 by shallow channels on one hand with the river, and 

 on the other with some slender tributary. Clean wooden 

 troughs, provided with sluices to guard against floods and 

 sediment from back water, if near the river's level, would 

 probably answer best. The egress of young fish and the 

 ingress of voracious aquatic enemies would have to be 

 prevented by the use of wire gratings, and the ponds would 

 probably need to be netted over to avoid the depredations 

 of rapacious birds. An area of two to four acres would 

 probably afibrd space enough for all the contrivances and 

 appliances needful, and also admit of the construction of a 

 cottage and garden for a resident overseer. 



21. The cost of forming ponds and channels depends 

 much upon the nature of the ground to be excavated, 

 and upon surface levels, &c. No precise site having yet 

 been determined upon, your Sub-Committee are unable 

 to form any close estimate of the probable amount of outlay 

 which these works would entail; but they are of opinion 

 that all the preliminary operations taken together may be 

 executed upon contract for a sum not exceeding £200. 



22. In conclusion, the Sub-Committee venture to suggest, 

 that even after the safe arrival and delivery of fecundated 

 spawn or of young fry, the success of the experiment may 

 be rendered still more certain by the offer of an additional 

 premium, to be paid upon the production of the first proof 

 of Salmon having actually spawned and bred in any Tas- 

 manian river, to the person who fixst placed Salmon spawn 

 or young Salmon in such river. 



(Signed) JOSEPH MILLIGAN", 



Secretary. 



The Report which was brought up, read, agreed 

 to, and ordered to be communicated to the 

 Government, at a meeting of the Royal Society 

 held on the IGth March, 185S, was transmitted 

 accordingly to the Hon. the Colonial Secretary, 

 on the 25th March, 1858. J. M. 



