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 xyz 

 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 Vo£-ht 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 



