﻿422 
  

  

  Brown: 
  Silicious 
  skeleton 
  

  

  f 
  ■ 
  

  

  TABLE 
  I 
  

  

  Changes 
  in 
  length 
  and 
  dlajmeters 
  of 
  xylem 
  of 
  Tecoma 
  xh^der 
  different 
  

  

  CONDITIONS. 
  

  

  In 
  parentheses 
  is 
  indicated 
  the 
  per 
  cent 
  of 
  gain 
  or 
  loss, 
  relative 
  to 
  dimensions 
  in 
  

   the 
  dry 
  state. 
  

  

  Length 
  

  

  5.52 
  mm. 
  

  

  S<52 
  

   5.53 
  

  

  5^53 
  

  

  5^53 
  

  

  5.53 
  

  

  553 
  

  

  5*53 
  

  

  S-53 
  

  

  4.7 
  

  

  4.5 
  

  

  4.4 
  

  

  4.3 
  

  

  4.3 
  

  

  4.3 
  

  

  3-3 
  

  

  3-3 
  

  

  (+0.1) 
  

  

  ( 
  

  

  ( 
  

  

  ( 
  

   ( 
  

  

  14.8) 
  

   -18.0) 
  

   -20.3) 
  

   -22.0) 
  

  

  tt 
  

  

  tt 
  

  

  (-40.0) 
  

  

  4t 
  

  

  Radial 
  diameter 
  

  

  

  Tangential 
  diameter 
  ( 
  Hours 
  

  

  8.53 
  mm. 
  

  

  9.07 
  

   9.40 
  

  

  9.48 
  

  

  9.48 
  

   9.48 
  

  

  9.48 
  

  

  9.48 
  

  

  9.48 
  

  

  II-3 
  

   12.2 
  

  

  II. 
  

  

  II.O 
  

  

  II. 
  

  

  II.O 
  

  

  6.9 
  

  

  6.9 
  

  

  (+6) 
  

   (+10) 
  

  

  (+32) 
  

  

  (+43) 
  

   (+29) 
  

  

  ti 
  

  

  4ft 
  

  

  €i 
  

  

  (-19) 
  

  

  «i 
  

  

  *t 
  

  

  41 
  

  

  .- 
  •< 
  

  

  tt 
  

  

  8.47 
  mm. 
  

   9.09 
  

  

  9-50 
  

  

  9-55 
  

  

  9-55 
  

   9.60 
  

  

  9.80 
  

  

  9.80 
  

  

  9.80 
  

  

  14.22 
  

  

  (15-7 
  

   14-5 
  

   13.3 
  

   13.3 
  

  

  13.3 
  

   7.3 
  

  

  7.3 
  

  

  (+7) 
  

  

  (+11) 
  

   ( 
  + 
  12.7) 
  

  

  ti 
  

  

  fi 
  

  

  €4 
  

  

  «< 
  

  

  (• 
  

  

  i 
  I 
  

  

  «ft 
  

  

  4« 
  

  

  €i 
  

  

  fti 
  

  

  <t 
  

  

  «f 
  

  

  •« 
  

  

  (+13.) 
  

   (+15.) 
  

  

  «i 
  

  

  «< 
  

  

  (+67.8) 
  

  

  (+85) 
  

   (+71) 
  

  

  (+57) 
  

  

  tft 
  

  

  li 
  

  

  (-13.8) 
  

  

  (« 
  

  

  10. 
  

   10.5 
  

  

  II.O 
  

  

  I3-0 
  

  

  15 
  o 
  

  

  19.0 
  

  

  22.0 
  

  

  32.Q 
  

  

  33-5 
  

   35-0 
  

   38.0 
  

  

  43-0 
  

   48. 
  

   56.0 
  

  

  56.5 
  

   6.4 
  

  

  Conditions 
  

  

  In 
  air, 
  100^ 
  C. 
  

   In 
  water, 
  100° 
  C 
  

  

  InHF 
  

  

  ft 
  ft 
  

  

  ftft 
  

  

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  4 
  

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  ft 
  

  

  ft 
  

   ft 
  

  

  ft 
  

  

  water 
  

   ftft 
  

  

  air, 
  100^ 
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  c< 
  

  

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  a 
  

  

  .3 
  

  

  o 
  

  

  i 
  

  

  h4 
  

  

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  *** 
  (.^ 
  

  

  

  : 
  ! 
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  '■ 
  

  

  

  

  1 
  

  

  c 
  

  

  

  

  \. 
  

  

  D 
  

  

  

  

  

  c 
  

  

  12 
  

  

  24 
  

  

  30 
  

  

  Hours 
  

  

  36 
  

  

  48 
  

  

  5A 
  

  

  60 
  

  

  €e 
  

  

  Fig. 
  s. 
  Graph 
  showing 
  changes 
  in 
  the 
  different 
  dimensions 
  of 
  the 
  xylem 
  of 
  

  

  •B, 
  in 
  boiling 
  water; 
  B 
  — 
  C, 
  in 
  hydrofluoric 
  acid. 
  A 
  

  

  Tecoma 
  

  

  collapse 
  of 
  mechanical 
  rigidity 
  commences 
  at 
  time, 
  B^ 
  C 
  — 
  D. 
  in 
  running 
  water; 
  D, 
  in. 
  

  

  sir, 
  

  

  