﻿MacDougal: 
  Growth 
  of 
  the 
  tomato 
  

  

  2G3 
  

  

  / 
  

  

  fruits 
  at 
  the 
  maximum 
  was 
  not 
  double 
  the 
  lowest 
  rate, 
  the 
  highest 
  

  

  w 
  

  

  occuring 
  while 
  the 
  fruit 
  was 
  very 
  small. 
  Increase 
  in 
  volume, 
  on 
  

   the 
  other 
  hand, 
  was 
  progressively 
  greater 
  and 
  as 
  the 
  fruit 
  neared 
  

   maturity 
  water 
  and 
  material 
  were 
  being 
  brought 
  in 
  nearly 
  five 
  

   times 
  as 
  fast 
  as 
  in 
  young 
  fruits. 
  This 
  delayed 
  maximum 
  might 
  

   be 
  connected 
  with 
  the 
  low 
  temperatures 
  under 
  which 
  the 
  develop- 
  

   ment 
  took 
  place, 
  as 
  the 
  highest 
  rate 
  of 
  accession 
  of 
  material 
  to 
  

   fruits 
  in 
  191 
  8 
  at 
  higher 
  temperatures 
  came 
  somewhat 
  earlier, 
  

   although 
  subsequent 
  to 
  the 
  maximum 
  increase 
  in 
  diameter. 
  

  

  A 
  second 
  fruit 
  measured 
  for 
  thirty-five 
  days 
  was 
  8 
  mm. 
  in 
  axial 
  

   diameter 
  at 
  the 
  beginning 
  and 
  had 
  a 
  volume 
  of 
  268 
  cu. 
  mm. 
  It 
  in- 
  

   creased 
  0.9 
  mm. 
  in 
  diameter 
  and 
  167 
  cu. 
  mm. 
  daily 
  for 
  a 
  week, 
  

   0.9 
  mm. 
  daily 
  for 
  the 
  second 
  week 
  with 
  an 
  accretion 
  of 
  492 
  cu. 
  

  

  ■ 
  

  

  mm., 
  0,7 
  mm. 
  daily 
  with 
  an 
  accretion 
  of 
  412 
  cu. 
  mm. 
  in 
  the 
  third 
  

   week, 
  a 
  rate 
  of 
  0.67 
  mm. 
  daily 
  with 
  an 
  accretion 
  of 
  1045 
  cu. 
  mm. 
  

   in 
  the 
  fourth 
  week, 
  and 
  0.3 
  mm. 
  daily 
  with 
  an 
  accretion 
  of 
  600 
  cu. 
  

   mm. 
  in 
  the 
  last 
  week. 
  

  

  A 
  comparison 
  of 
  increases 
  in 
  diameter 
  and 
  volume 
  is 
  given 
  

   below 
  : 
  

  

  Rate 
  of 
  increase 
  

  

  Diameter 
  

   Volume. 
  . 
  

  

  First 
  

   week 
  

  

  27 
  

   27 
  

  

  Second 
  

   week 
  

  

  27 
  

  

  56 
  

  

  Third 
  

   week 
  

  

  

  21 
  

  

  59 
  

  

  Fourth 
  

  

  week 
  

  

  20 
  

  

  150 
  

  

  Fifth 
  

   week 
  

  

  9 
  

  

  185 
  

  

  vary 
  

  

  widely 
  until 
  at 
  the 
  last, 
  when 
  it 
  dropped 
  to 
  less 
  than 
  half 
  that 
  

  

  + 
  

  

  which 
  had 
  previously 
  prevailed. 
  The 
  rate 
  of 
  increase 
  in 
  volume 
  

   rose 
  steadily 
  until 
  at 
  the 
  end 
  it 
  was 
  seven 
  times 
  as 
  great 
  as 
  during 
  

  

  the 
  first 
  week. 
  

  

  accretion 
  

  

  globe, 
  the 
  volume 
  of 
  the 
  fruit 
  at 
  any 
  time 
  being 
  determined 
  by 
  

   the 
  use 
  of 
  the 
  formula 
  V 
  = 
  4/3 
  {PiR^). 
  A 
  layer 
  of 
  a 
  given 
  

   thickness 
  on 
  a 
  large 
  fruit 
  would 
  obviously 
  include 
  a 
  much 
  greater 
  

   amount 
  of 
  material 
  than 
  a 
  layer 
  of 
  similar 
  thickness 
  on 
  a 
  small 
  

   fruit. 
  

  

  grow 
  

  

  fruit 
  must 
  be 
  considered, 
  are 
  something 
  different 
  from 
  those 
  which 
  

   prevail 
  in 
  a 
  stem 
  with 
  its 
  successively 
  developing 
  members 
  or 
  

   internodes, 
  or 
  in 
  leaves 
  which 
  proceed 
  to 
  a 
  definite 
  average 
  size 
  

  

  