﻿Rusk: 
  Protoplasmic 
  streaming 
  

  

  431 
  

  

  The 
  results 
  of 
  this 
  study 
  are 
  oflfered 
  as 
  additional 
  evidence 
  that 
  

   very 
  dilute 
  poisons 
  act 
  a& 
  stimulants 
  to 
  plant 
  cells. 
  

  

  This 
  work 
  was 
  done 
  at 
  the 
  suggestion 
  and 
  under 
  the 
  direction 
  

   of 
  Dr. 
  Herbert 
  M. 
  Richards, 
  to 
  whom 
  the 
  writer 
  is 
  greatly 
  in- 
  

   debted 
  for 
  advice 
  and 
  encouragement. 
  

  

  ft 
  

  

  Botanical 
  Laboratory, 
  

   Barnard 
  College, 
  

  

  CoLTjMBiA 
  University. 
  

  

  Literature 
  cited 
  

  

  w 
  

  

  I 
  - 
  Ewart, 
  A* 
  J. 
  On 
  the 
  physics 
  and 
  physiology 
  of 
  protoplasmic 
  

   streaming 
  in 
  plants. 
  Oxford. 
  1903. 
  

  

  2. 
  Richards, 
  H. 
  M. 
  Die 
  Beeinflussung 
  des 
  Wachstums 
  einiger 
  Pilzc 
  

  

  durch 
  chemische 
  Reize. 
  Jahrb. 
  Wiss. 
  Bot. 
  30: 
  665-688. 
  1897. 
  

  

  3. 
  Richards, 
  H. 
  M. 
  The 
  effect 
  of 
  chemical 
  irritation 
  on 
  the 
  economic 
  

  

  coefficient 
  of 
  sugar. 
  Bull. 
  Torrey 
  Club 
  26: 
  463-479. 
  1899. 
  

  

  4. 
  Latham, 
  M. 
  E. 
  Nitrogen 
  assimilation 
  of 
  Sterigmatocystis 
  nigra 
  

  

  and 
  the 
  effect 
  of 
  chemical 
  stimulation- 
  Bull. 
  Torrey 
  Club 
  36: 
  

   235-244. 
  1909. 
  

  

  