﻿Multiplication 
  of 
  Extremes 
  753 
  

  

  of 
  the 
  variety, 
  and 
  only 
  the 
  partial 
  fluctuability, 
  

   due 
  to 
  the 
  effect 
  of 
  later 
  influences, 
  can 
  now 
  be 
  

   studied 
  statistically. 
  

  

  This 
  study 
  has 
  for 
  its 
  main 
  object 
  the 
  pro- 
  

   duction 
  of 
  sugar 
  in 
  the 
  stems, 
  and 
  the 
  curves, 
  

   which 
  indicate 
  the 
  percentage 
  of 
  this 
  important 
  

   substance 
  in 
  different 
  stems 
  of 
  the 
  same 
  variety, 
  

   comply 
  with 
  Quetelet's 
  law. 
  Each 
  variety 
  has 
  

   its 
  own 
  average, 
  and 
  around 
  this 
  the 
  data 
  of 
  the 
  

   majority 
  of 
  the 
  stems 
  are 
  densely 
  crowded, 
  

   while 
  deviations 
  on 
  both 
  sides 
  are 
  rare 
  and 
  be- 
  

   come 
  the 
  rarer 
  the 
  wider 
  they 
  are. 
  The 
  ' 
  ' 
  Cher- 
  

   ibon 
  " 
  cane 
  is 
  the 
  richest 
  variety 
  cultivated 
  in 
  

   Java, 
  and 
  has 
  an 
  average 
  of 
  19$ 
  sugar, 
  while 
  it 
  

   fluctuates 
  between 
  11$ 
  and 
  28$. 
  " 
  Chunnic 
  ' 
  

   averages 
  14$, 
  " 
  Black 
  Manilla" 
  13$ 
  and 
  "White 
  

   Manilla 
  ' 
  ' 
  10$ 
  ; 
  their 
  highest 
  and 
  lowest 
  extremes 
  

   diverge 
  in 
  the 
  same 
  manner, 
  being 
  for 
  the 
  last 
  

   named 
  variety 
  1$ 
  and 
  15$. 
  

  

  This 
  partial 
  variability 
  is 
  of 
  high 
  practical 
  

   interest, 
  because 
  on 
  it 
  a 
  selection 
  may 
  be 
  found- 
  

   ed. 
  According 
  to 
  the 
  conceptions 
  described 
  in 
  

   a 
  previous 
  lecture, 
  fluctuating 
  variability 
  is 
  the 
  

   result 
  of 
  those 
  outward 
  factors 
  that 
  determine 
  

   the 
  strength 
  of 
  development 
  of 
  the 
  plant 
  or 
  the 
  

   organ. 
  The 
  inconstancy 
  of 
  the 
  degree 
  of 
  sensi- 
  

   bility, 
  combined 
  with 
  the 
  ever-varying 
  weather- 
  

   conditions 
  preclude 
  any 
  close 
  proportionality, 
  

   but 
  apart 
  from 
  this 
  difficulty 
  there 
  is, 
  in 
  the 
  

  

  