﻿140 
  Harper: 
  Inheritanxe 
  of 
  sugar 
  

  

  been 
  more 
  widely 
  quoted 
  than 
  his 
  actual 
  data. 
  He 
  tested 
  two 
  sweet 
  

   races, 
  his 
  No, 
  HI 
  R, 
  caerulaeodidcis 
  and 
  No. 
  VI 
  R. 
  didcisy 
  both 
  

   of 
  which 
  he 
  describes 
  as 
  constant. 
  The 
  seed 
  was 
  obtained 
  from 
  

   Haage 
  and 
  Schmidt 
  and 
  both 
  races 
  are 
  described 
  by 
  Koernicke 
  

   ('85). 
  The 
  total 
  number 
  of 
  crosses 
  between 
  sweets 
  and 
  flint 
  

   and 
  pops 
  where 
  only 
  one 
  kind 
  of 
  pollen 
  was 
  used 
  was 
  twenty-one. 
  

   Eighteen 
  were 
  between 
  flint 
  and 
  sweet 
  races 
  and 
  two 
  were 
  between 
  

   pop 
  and 
  sweet 
  races. 
  One 
  involved 
  the 
  doubtful 
  pop 
  race 
  R. 
  nana. 
  

   In 
  five 
  cases 
  he 
  reports 
  as 
  smooth 
  or 
  almost 
  smooth 
  the 
  kernels 
  

   in 
  the 
  Fi 
  from 
  crosses 
  of 
  flints 
  and 
  sweets, 
  but 
  states 
  without 
  very 
  

   detailed 
  comparisons 
  that 
  the 
  microscopic 
  characters 
  of 
  these 
  

  

  f 
  

  

  kernels 
  are 
  like 
  those 
  of 
  the 
  starch-bearing 
  parent. 
  

  

  In 
  none 
  of 
  these 
  cases 
  are 
  the 
  reciprocals 
  reported 
  as 
  showing 
  

   Intermediate 
  kernels. 
  In 
  one 
  case 
  (p. 
  67 
  and 
  pL 
  i,f. 
  50) 
  he 
  figures 
  

   a 
  kernel 
  which 
  is 
  markedly 
  pitted 
  or 
  wrinkled 
  at 
  one 
  point 
  while 
  the 
  

   rest 
  of 
  the 
  kernel 
  is 
  smooth 
  and 
  flint-like. 
  In 
  another 
  case 
  (p. 
  56) 
  

   a 
  sweet 
  corn 
  by 
  a 
  sweet 
  corn 
  gave 
  some 
  kernels 
  not 
  so 
  deeply 
  

   wrinkled 
  as 
  the 
  parents, 
  though 
  he 
  states, 
  "the 
  chemical 
  compo- 
  

   sition 
  of 
  the 
  endosperm 
  was 
  not 
  changed." 
  

  

  In 
  two 
  cases 
  (pp. 
  70 
  and 
  76) 
  he 
  reports 
  a 
  sweet 
  (i?. 
  caerulaeo- 
  

   dtilcis) 
  pollinated 
  on 
  the 
  one 
  hand 
  by 
  a 
  pop 
  corn 
  {R. 
  leucoceras) 
  

   and 
  on 
  the 
  other 
  by 
  a 
  flint 
  {R. 
  vidgata) 
  as 
  giving 
  some 
  kernels 
  

   slightly 
  dent-like 
  in 
  type 
  in 
  the 
  Fi. 
  The 
  first 
  of 
  these 
  cases 
  he 
  

   figures 
  in 
  pL 
  J,/. 
  72, 
  and 
  the 
  second 
  in 
  ph 
  i,f, 
  8y 
  and 
  in 
  pi. 
  2,f. 
  77, 
  

   In 
  the 
  latter 
  case 
  an 
  entire 
  ear 
  is 
  shown 
  with 
  most 
  of 
  the 
  kernels 
  

   slightly 
  dimpled 
  and 
  a 
  few 
  with 
  quite 
  characteristic 
  but 
  poorly 
  

   developed 
  wrinkling. 
  Correns 
  also 
  (p. 
  88) 
  notes 
  a 
  tendency 
  in 
  

   crosses 
  of 
  sugar 
  corn 
  by 
  flint 
  types 
  to 
  what 
  he 
  regards 
  as 
  approach- 
  

   ing 
  a 
  dent 
  form 
  of 
  kernel 
  in 
  the 
  Fi. 
  He 
  also 
  notes 
  (p. 
  89) 
  that 
  in 
  

  

  T 
  

  

  crosses 
  of 
  flints 
  by 
  sweet 
  types 
  occasional 
  kernels 
  show 
  an 
  approach 
  

   to 
  the 
  SAveet 
  type 
  in 
  the 
  Fi. 
  Correns 
  found 
  in 
  his 
  pure 
  sweet 
  race 
  

   {R. 
  dulcis) 
  occasional 
  kernels 
  which 
  are 
  less 
  wrinkled 
  or 
  almost 
  

   smooth 
  (pp. 
  39 
  and 
  40, 
  /. 
  4c, 
  5&, 
  and 
  pi. 
  ij. 
  22) 
  and 
  explains 
  them 
  

   as 
  having 
  a 
  larger 
  air 
  cavity 
  and 
  a 
  larger 
  mealy 
  area 
  making 
  this 
  a 
  

   general 
  explanation 
  for 
  intermediates 
  (p. 
  39). 
  

  

  His 
  figure 
  of 
  a 
  section 
  of 
  such 
  a 
  kernel 
  (p. 
  38) 
  does 
  not 
  make 
  

   clear 
  that 
  there 
  is 
  a 
  larger 
  air 
  cavity 
  in 
  such 
  grains 
  but 
  his 
  figure 
  {pi. 
  

   ^1 
  f' 
  22) 
  gives 
  a 
  fairly 
  good 
  representation 
  of 
  the 
  appearance 
  of 
  such 
  

  

  