﻿500 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  

  

  (I'roirlh 
  iiwasurcments 
  of 
  Potamogeton 
  perJ'oUaius 
  at 
  the 
  end 
  of 
  seven 
  weeks, 
  

   of 
  each 
  cutting, 
  15 
  on. 
  

  

  Original 
  length 
  

  

  " 
  Fruited. 
  

   Summary 
  of 
  results 
  in 
  four 
  condition.^ 
  

  

  Rooted 
  

   in 
  soil. 
  

  

  Rooted 
  

   in 
  sand. 
  

  

  Anchor- 
  

   ed 
  over 
  

  

  Anchor- 
  

   ed 
  over 
  

  

  Average 
  length 
  of 
  rhizome 
  

  

  Average 
  length 
  of 
  rhizome-internode 
  

  

  Average 
  length 
  of 
  secondary 
  shoots 
  

  

  Average 
  length 
  of 
  internode 
  of 
  secondary 
  shoots 
  

  

  Cm. 
  

   69.93 
  

  

  4.7 
  

   23. 
  82 
  

  

  1 
  3 
  

  

  Cm. 
  

   13. 
  28 
  

   3.07 
  

  

  Cm. 
  

  

  20.5 
  

   2.45 
  

   1.8 
  

  

  .57 
  

  

  Cm. 
  

  

  21.2 
  

  

  2.7 
  

  

  2.3 
  

  

  .5 
  

  

  