﻿Organisms 
  and 
  Nucleic 
  Acid 
  Derivatives 
  on 
  Plant 
  Growth. 
  93 
  

  

  the 
  other 
  series 
  the 
  following 
  additions 
  were 
  made 
  : 
  Series 
  II, 
  numbered 
  

   from 
  6 
  to 
  10, 
  the 
  ash 
  from 
  the 
  crude 
  nucleic 
  acid 
  derivatives 
  from 
  1 
  grm. 
  of 
  

   raw 
  peat 
  per 
  500 
  c.c. 
  of 
  solution 
  ; 
  Series 
  III, 
  numbered 
  from 
  11 
  to 
  15, 
  the 
  

   crude 
  nucleic 
  acid 
  derivatives 
  in 
  a 
  similar 
  proportion 
  ; 
  Series 
  IV, 
  numbered 
  

   from 
  16 
  to 
  20, 
  the 
  ash 
  from 
  1 
  grm. 
  of 
  Azotobacter 
  growth 
  per 
  1000 
  c.c. 
  ; 
  

   and 
  Series 
  V, 
  numbered 
  from 
  21 
  to 
  25, 
  1 
  grm. 
  of 
  the 
  original 
  Azotobacter 
  

   growth 
  per 
  1000 
  c.c. 
  Ten 
  similar 
  plants 
  of 
  Zemna 
  minor 
  were 
  counted 
  out 
  

   into 
  each 
  of 
  the 
  dishes, 
  which 
  were 
  covered 
  on 
  bottom 
  and 
  sides 
  with 
  black 
  

   paper. 
  Three 
  hundred 
  plants 
  of 
  size 
  comparable 
  with 
  those 
  used 
  in 
  the 
  

   dishes 
  were 
  counted 
  out 
  at 
  the 
  same 
  time 
  for 
  an 
  estimation 
  of 
  their 
  dry 
  

   weight. 
  The 
  plants 
  were 
  grown 
  under 
  similar 
  conditions 
  to 
  those 
  recorded 
  

   in 
  the 
  above 
  experiments, 
  solutions 
  being 
  changed 
  twice 
  weekly 
  while 
  the 
  

   plants 
  were 
  counted 
  once 
  weekly, 
  and 
  halved 
  or 
  quartered 
  when 
  necessary. 
  

   The 
  following 
  are 
  the 
  results 
  obtained 
  : 
  — 
  

  

  Table 
  VI. 
  

  

  Series 
  No. 
  

  

  Dish 
  

  

  1st 
  

  

  2nd 
  

  

  3rd 
  

  

  4th 
  

  

  5th 
  

  

  6th 
  

  

  7th 
  

  

  No. 
  

  

  week. 
  

  

  week. 
  

  

  week. 
  

  

  week. 
  

  

  week. 
  

  

  week. 
  

  

  week. 
  

  

  r. 
  

  

  r 
  

  

  1 
  

  

  37 
  

  

  86 
  

  

  252 
  

  

  464 
  

  

  768 
  

  

  1,344 
  

  

  3,776 
  

  

  

  2 
  

  

  34 
  

  

  79 
  

  

  252 
  

  

  480 
  

  

  768 
  

  

  1,408 
  

  

  4,416 
  

  

  Detmer's 
  Solution 
  

  

  -i 
  

   i 
  

  

  3 
  

  

  34 
  

  

  72 
  

  

  232 
  

  

  496 
  

  

  896 
  

  

  1,536 
  

  

  4,800 
  

  

  

  4 
  

  

  34 
  

  

  77 
  

  

  220 
  

  

  480 
  

  

  992 
  

  

  1,536 
  

  

  4,992 
  

  

  

  I 
  

  

  5 
  

  

  33 
  

  

  76 
  

  

  264 
  

  

  464 
  

  

  800 
  

  

  1,408 
  

  

  4,224 
  

  

  Mean 
  

  

  

  

  34-4 
  

  

  78 
  -0 
  

  

  244 
  -0 
  

  

  476 
  -8 
  

  

  844-8 
  

  

  1,446 
  -4 
  

  

  4,441 
  "6 
  

  

  

  

  II. 
  

  

  

  

  

  

  

  

  

  

  

  Detmer's 
  Solution 
  

  

  r 
  

   i 
  

  

  6 
  

   7 
  

  

  32 
  

   46 
  

  

  73 
  

   85 
  

  

  216 
  

   252 
  

  

  472 
  

   528 
  

  

  864 
  

   896 
  

  

  1,536 
  

   1,408 
  

  

  4,928 
  

   4,288 
  

  

  + 
  

  

  Ash 
  from 
  Nucleic 
  

   Acid 
  Derivatives 
  

  

  -i 
  

   i 
  

  

  i 
  

  

  8 
  

   9 
  

   10 
  

  

  46 
  

   40 
  

   35 
  

  

  86 
  

   94 
  

   83 
  

  

  264 
  

   244 
  

   220 
  

  

  448 
  

   528 
  

   464 
  

  

  960 
  

   768 
  

   768 
  

  

  1,536 
  

   1,472 
  

   1,408 
  

  

  5,504 
  

   4,544 
  

   3,840 
  

  

  Mean 
  

  

  

  

  39-8 
  

  

  84-1 
  

  

  239-2 
  

  

  488-0 
  

  

  851 
  -2 
  

  

  1,472 
  

  

  4,620 
  -8 
  

  

  

  

  

  III. 
  

  

  

  

  

  

  

  

  

  

  

  Detmer's 
  Solution 
  

   + 
  

  

  Nucleic 
  Acid 
  

   Derivatives 
  

  

  r 
  

   i 
  

  

  11 
  

   12 
  

  

  33 
  

   52 
  

  

  128 
  

   132 
  

  

  436 
  

   480 
  

  

  1,272 
  

   1,128 
  

  

  3,136 
  

   3,360 
  

  

  9,472 
  

   8,960 
  

  

  34,688 
  

   38,144 
  

  

  \ 
  

  

  13 
  

  

  41 
  

  

  127 
  

  

  432 
  

  

  1,184 
  

  

  3,584 
  

  

  10,176 
  

  

  39.232 
  

  

  1 
  

  

  14 
  

  

  42 
  

  

  113 
  

  

  468 
  

  

  1,224 
  

  

  3,424 
  

  

  9,984 
  

  

  39,680 
  

  

  

  15 
  

  

  39 
  

  

  117 
  

  

  412 
  

  

  1,208 
  

  

  3,008 
  

  

  9,024 
  

  

  38,912 
  

  

  Mean 
  

  

  

  

  41 
  -4 
  

  

  123 
  -4 
  

  

  445 
  -6 
  

  

  1,203 
  -2 
  

  

  3,302 
  -4 
  

  

  9,523 
  -2 
  

  

  38,131 
  -2 
  

  

  

  

  