﻿CONTENTS. 
  

  

  Pagre, 
  

  

  Introduction 
  485-489 
  

  

  Historical 
  review 
  489-493 
  

  

  Comparative 
  study 
  of 
  growth 
  under 
  varying 
  conditions 
  of 
  initrition 
  493-509 
  

  

  Influence 
  of 
  substratum 
  494-506 
  

  

  Growth 
  in 
  nutrient 
  solutions 
  506-509 
  

  

  Significance 
  and 
  distribution 
  of 
  root 
  hairs 
  509-510 
  

  

  Behavior 
  of 
  roots 
  as 
  organs 
  of 
  absorption 
  510-51 
  2 
  

  

  Absorption 
  of 
  lithium 
  nitrate 
  510-511 
  

  

  Measurement 
  of 
  root 
  absorption 
  511-512 
  

  

  Chemical 
  analysis 
  513-514 
  

  

  Correlation 
  of 
  growth 
  and 
  unconsumed 
  starch 
  514 
  

  

  Light 
  and 
  mechanical 
  contact 
  as 
  factors 
  in 
  the 
  development 
  of 
  lateral 
  roots. 
  515 
  

  

  Recapitulation 
  and 
  theoretical 
  discussion 
  516-521 
  

  

  Conclusions 
  521-522 
  

  

  Economic 
  significance 
  of 
  results 
  522-525 
  

  

  Bibliography 
  525-526 
  

  

  484 
  

  

  