﻿iv 
  INTIK'IH 
  TloN 
  TO 
  I'.OTAXY 
  * 
  

  

  peculiar 
  educational 
  si^niiicance. 
  Jo 
  this 
  cud 
  those 
  aspects 
  

   of 
  tin- 
  plant 
  world 
  which 
  touch 
  human 
  interests 
  and 
  activities 
  

   01 
  i-l 
  it 
  to 
  receive 
  particular 
  attention. 
  It 
  is 
  essential, 
  also, 
  that 
  

   the 
  study 
  be 
  so 
  shaped 
  as 
  to 
  give 
  the 
  student 
  a 
  reasonable 
  view 
  

   of 
  the 
  phenomena 
  of 
  life 
  a^ 
  einhod 
  ied 
  in 
  plants, 
  for 
  the 
  aver- 
  

   age 
  |>npil 
  (\\lio 
  does 
  not 
  :_>-o 
  tn 
  college) 
  will 
  ncvci 
  1 
  a^aiii 
  have 
  

   80 
  ^-o. 
  id 
  an 
  ojipori 
  unity 
  to 
  learn 
  about 
  the 
  simpler 
  manifesta- 
  

   tions 
  of 
  life 
  as 
  is 
  offered 
  in 
  his 
  hi^li-school 
  course 
  in 
  botany. 
  

   It 
  is 
  believed 
  by 
  the 
  authors 
  that 
  every 
  lii^h-school 
  pupil 
  

   should 
  be 
  introduced 
  to 
  certain 
  elementary 
  and 
  important 
  facts 
  

   regard 
  iii^- 
  the 
  life 
  processes 
  and 
  problems 
  of 
  living 
  things, 
  and 
  

   the 
  tirst-hand 
  study 
  of 
  plant 
  life 
  offers 
  an 
  especiallv 
  favorable 
  

   means 
  of 
  presenting 
  these 
  elementary 
  biological 
  truths. 
  

  

  The 
  order 
  of 
  treatment 
  here 
  adopted 
  is 
  lirst 
  to 
  give 
  a 
  general 
  

   notion 
  of 
  the 
  world-wide 
  distribution 
  and 
  importance 
  of 
  plants; 
  

   then 
  to 
  enable 
  the 
  pupil 
  to 
  see 
  the 
  whole 
  plant 
  as 
  a 
  working 
  

   machine; 
  then 
  to 
  discuss 
  more 
  in 
  detail 
  the 
  structure 
  and 
  work 
  

   of 
  the 
  higher 
  plants, 
  each 
  region 
  of 
  which 
  performs 
  a 
  definite 
  

   part 
  ot 
  the 
  \\ork 
  of 
  the 
  whole 
  machine; 
  then 
  very 
  briellv 
  to 
  

   present 
  a 
  general 
  \ 
  icw 
  of 
  the 
  LM 
  cat 
  ^roups. 
  Although 
  through- 
  

   out 
  the 
  book 
  the 
  plants 
  used 
  as 
  the 
  basis 
  of 
  study 
  are 
  usnallv 
  

   those 
  of 
  common 
  interest, 
  a 
  few 
  of 
  the 
  most 
  practical 
  topics, 
  

   such 
  as 
  timber 
  and 
  forestry, 
  weeds, 
  plant 
  breeding, 
  and 
  the 
  

   plant 
  industries, 
  are 
  given 
  separate 
  treatment, 
  with 
  as 
  much 
  

   detail 
  as 
  is 
  possible 
  in 
  a 
  brief 
  course. 
  The 
  structure, 
  functions, 
  

  

  and 
  ecological 
  relations 
  of 
  plants 
  are 
  presented 
  throughout 
  the 
  

  

  I 
  k 
  in 
  a 
  synthet 
  ic 
  manner. 
  

  

  (Questions 
  pertaining 
  to 
  tin- 
  interpretat 
  ion 
  and 
  application 
  of 
  

   different 
  features 
  of 
  plant 
  life 
  are 
  introduced 
  in 
  the 
  text 
  and 
  

   at 
  the 
  ends 
  of 
  chapters. 
  < 
  Mher 
  similar 
  questions 
  raised 
  by 
  the 
  

   ('achd- 
  will 
  be 
  found 
  helpful 
  in 
  present 
  in-r 
  problems 
  that 
  the 
  

   pupil 
  should 
  be 
  able 
  to 
  solve 
  in 
  connection 
  with 
  his 
  studies. 
  

   Such 
  problems 
  help 
  t 
  o 
  develop 
  the 
  constant 
  attitude 
  of 
  inquiry 
  

   which 
  science 
  attempts 
  to 
  establish. 
  

  

  