194 Salmon at the Antipodes. 



for the purpose. The Yarra river also, not- 

 withstanding that its "waters are sometimes 

 poisoned by the noxious refuse from many 

 factories, will, I think, prove well suited to 

 the Californian salmon, as their descent and 

 ascent would probably take place after a flood, 

 which would have purified the few miles of 

 the river near Melbourne most dangerous to 

 them; and a swift- swimming fish, that can 

 go 30 miles up the stream in a day, will 

 pass through the most dangerous part of the 

 river, opposite Melbourne, in a few hours. It 

 is impossible to foresee the result of experi- 

 ments of this kind in a new country, and 

 under new conditions. We have instances of 

 animals introduced here succeeding in the 

 most wonderful way, and of others which 

 seemed to promise equally well, but which 

 have utterly failed, so that the test of ex- 

 periment is the safest guide. 



It is only about 60 years since that a 

 salmon of 20 lbs.' weight was caught in the 

 Thames, near Windsor, notwithstanding that 

 the sewage from millions of people living 

 on its banks was allowed to flow into it ; 

 and salmon fry have been re-introduced into 



