﻿Balanced 
  Crosses 
  289 
  

  

  and 
  sugary 
  varieties 
  are 
  in 
  this 
  respect 
  wholly 
  

   constant, 
  when 
  cultivated 
  separately. 
  No 
  

   change 
  is 
  to 
  be 
  seen 
  in 
  the 
  spikes. 
  Further- 
  

   more 
  it 
  is 
  very 
  easy 
  to 
  make 
  the 
  crosses. 
  The 
  

   best 
  way 
  is 
  to 
  cultivate 
  both 
  types 
  in 
  alternate 
  

   rows 
  and 
  to 
  cut 
  off 
  the 
  stamiuate 
  panicles 
  a 
  few 
  

   days 
  before 
  they 
  open 
  their 
  first 
  flowers. 
  If 
  

   this 
  operation 
  is 
  done 
  on 
  all 
  the 
  individuals 
  of 
  

   one 
  variety, 
  sparing 
  all 
  the 
  panicles 
  of 
  the 
  

   other, 
  it 
  is 
  manifest 
  that 
  all 
  the 
  plants 
  will 
  be- 
  

   come 
  fertilized 
  by 
  the 
  latter, 
  and 
  hence 
  that 
  the 
  

   castrated 
  plants 
  will 
  only 
  bear 
  hybrid 
  seeds. 
  

  

  The 
  experiment 
  may 
  be 
  made 
  in 
  two 
  ways 
  ; 
  by 
  

   castrating 
  the 
  sugary 
  or 
  the 
  starchy 
  variety. 
  

   In 
  both 
  cases 
  the 
  hybrid 
  kernels 
  are 
  the 
  same. 
  

   As 
  to 
  their 
  composition 
  they 
  repeat 
  the 
  active 
  

   character 
  of 
  the 
  starchy 
  variety. 
  The 
  sugar 
  is 
  

   only 
  accumulated 
  as 
  a 
  result 
  of 
  an 
  incapacity 
  

   of 
  changing 
  it 
  into 
  starch, 
  and 
  the 
  lack 
  of 
  this 
  

   capacity 
  is 
  to 
  be 
  considered 
  as 
  a 
  retrogressive 
  

   varietal 
  mark. 
  The 
  starch-producing 
  unit- 
  

   character, 
  which 
  is 
  active 
  in 
  the 
  ordinary 
  sorts 
  

   of 
  corns, 
  is 
  therefore 
  latent 
  in 
  sugar-corn. 
  

  

  In 
  order 
  to 
  obtain 
  the 
  second 
  generation, 
  the 
  

   hybrid 
  grains 
  are 
  sown 
  under 
  ordinary 
  condi- 
  

   tions, 
  but 
  sufficiently 
  distant 
  from 
  any 
  other 
  

   variety 
  of 
  corn 
  to 
  insure 
  pure 
  fertilization. 
  

   The 
  several 
  individuals 
  may 
  be 
  left 
  to 
  pollinate 
  

  

  