IVeight and Length of Brook -Trout. 



607 



Curve showing the relation between the length and weight of brook-trout. 

 The continuous heavy line represents the results of observation. 

 The dotted line shows where the theoretical curve differs from that obtained by 

 observation. 



INCHES 

 U IS It 17 It H It II a 11 



■ I 



u 



dH 



DNI 



l| 



U 



Length in inches. Number of observations. 



23 

 22 

 21 

 20 



»9 

 18 



'7 

 16 



•5 

 «4 

 '3 



1 



2 



6 



12 



9 



9 



10 



9 

 6 



3 

 1 



