ON LAKES, POOLS, ETC. 139 



CHAPTEE VIII. 



ON LAKES, POOLS, ETC. 



AN immense portion of our water acreage consists of 

 lakes. Such of these lakes as communicate with the 

 sea by means of rivers that are passable to fish are, 

 for the most part, capable of supporting salmon and 

 sea trout. In some there may be but a badly defined 

 passage in this respect ; in these instances every art 

 that can render such passages practicable to fish 

 should be put into requisition, as a? lake is always most 

 valuable to a river, being to the salmon a safe resting- 

 lace and harbour of refuge. When there are im- 

 passable falls, salmon-stairs should be erected (see 

 Appendix) ; a weir, with hatches at the outlet of the 

 lake, should be placed so as to force back the water, 

 until a sufficient quantity be collected to form a good 

 running volume, on the first favourable rainfall. If 

 salmon or sea trout exist not already in them, artifi- 

 cial propagation should be undertaken in the small 

 tributary head waters ; and every possible means 

 should be adopted to render the salmon a tenant of its 



