148 FISH CULTURE. 



the best-sized fish, and the greatest number of them. 

 Given these three unknown quantities, what are the 

 relative proportions? How is this piscatorial x yz 

 to be determined? Will anyone join in trying to 

 work up the form of the equation ? What is that 

 xyz to be equal to? Is it to be a plus quantity or 

 a minus quantity? I have worked hard for many 

 years to make a plus quantity of it, and hope to be 

 succes ul at last. If I am, I shall not have striven 

 in vain I shall have done some little good for 

 my fellows ; for surely there is many a hungry 

 belly and many an empty pouch going, that might 

 be filled if that same equation were only properly 

 worked out ! 



The charr might certainly be much more widely 

 spread in our lakes than it is, if judiciously intro- 

 duced. 



The Ombre Chevalier, or charr of central Europe, 

 by some is said to be another variety. It is a very 

 delicious charr. Whether it really be a different 

 species from our charr or no, I cannot decide. Dr. 

 Giinther holds that it is. Carl Voght gives it the 

 following names : " The Knight or Eotheli, Salbling, 

 Salmarin, Schwarzrentrel, Salmo Umbla, Salmo Sal- 

 velinus, L'Ombre Chevalier, Char," and says that it 



