﻿1875.] 
  

  

  of 
  the 
  Connective 
  Tissues. 
  

  

  185 
  

  

  distinct. 
  The 
  paper 
  is 
  chiefly 
  a 
  record 
  of 
  observations 
  made 
  by 
  this 
  method. 
  

   The 
  author 
  shows 
  : 
  — 
  

  

  1. 
  After 
  a 
  horizontal 
  section 
  of 
  the 
  cornea 
  has 
  been 
  sealed 
  up 
  for 
  about 
  

   24 
  hours, 
  the 
  stellate 
  branched 
  cells 
  are 
  seen 
  to 
  consist 
  of 
  a 
  mass 
  of 
  pro- 
  

   toplasma, 
  sharply 
  defined 
  on 
  every 
  side, 
  except 
  where 
  it 
  is 
  continued 
  for 
  

   a 
  scarcely 
  perceptible 
  distance 
  into 
  the 
  processes. 
  The 
  nucleus 
  is 
  flat- 
  

   tened. 
  The 
  processes 
  become 
  very 
  fine, 
  glistening, 
  and 
  thread-like 
  

   almost 
  immediately 
  after 
  leaving 
  the 
  cell, 
  and, 
  by 
  dividing 
  and 
  anasto- 
  

   mosing 
  with 
  the 
  processes 
  of 
  other 
  cells, 
  form 
  a 
  rich 
  and 
  very 
  delicate 
  

   network. 
  

  

  2. 
  It 
  sometimes 
  happens, 
  although 
  only 
  in 
  rare 
  instances, 
  that, 
  in 
  gold 
  

   preparations, 
  fine 
  dark 
  lines 
  extend 
  between 
  the 
  nuclei, 
  and 
  correspond 
  in 
  

   outline 
  and 
  course 
  with 
  the 
  processes 
  seen 
  in 
  the 
  aqueous 
  humour 
  ; 
  and 
  it 
  

   is 
  then 
  evident 
  that 
  they 
  are 
  surrounded 
  by 
  the 
  dark-coloured 
  tracts 
  which 
  

   form 
  the 
  ordinary 
  network 
  seen 
  in 
  gold 
  preparations, 
  and 
  which 
  corre- 
  

   spond, 
  in 
  outline 
  and 
  varying 
  degree 
  of 
  development 
  in 
  different 
  animals, 
  

   ages, 
  and 
  pathological 
  conditions, 
  with 
  the 
  corneal 
  spaces. 
  

  

  3. 
  Similar 
  appearances 
  to 
  those 
  described 
  in 
  paragraph 
  1 
  are 
  seen 
  in 
  

   sections 
  of 
  cornea 
  which 
  have 
  been 
  5 
  to 
  10 
  days 
  sealed 
  up 
  in 
  a 
  10-per- 
  

   cent, 
  solution 
  of 
  common 
  salt. 
  

  

  4. 
  The 
  quadrangular 
  and 
  long 
  narrow 
  flat 
  cells 
  shown 
  by 
  the 
  author 
  

   to 
  exist 
  in 
  the 
  cornea, 
  by 
  means 
  of 
  a 
  saturated 
  solution 
  of 
  potash, 
  are 
  also 
  

   rendered 
  visible 
  by 
  the 
  above 
  method. 
  They 
  are 
  best 
  seen 
  in 
  oblique 
  

   sections, 
  from 
  which, 
  after 
  2 
  to 
  5 
  days, 
  they 
  fall 
  out 
  singly 
  and 
  in 
  rows. 
  

   A 
  row 
  of 
  the 
  long 
  narrow 
  cells 
  is 
  often 
  seen 
  to 
  terminate 
  in 
  quadrangular 
  

   cells 
  at 
  either 
  end. 
  These 
  cells 
  have 
  a 
  perfectly 
  hyaline 
  appearance 
  ; 
  

   their 
  nucleus 
  has 
  a 
  very 
  faint 
  yellowish 
  tiuge, 
  and 
  projects 
  beyond 
  the 
  

   surface 
  of 
  the 
  cell. 
  

  

  In 
  exceptional 
  instances, 
  in 
  the 
  uncut 
  cornea 
  of 
  the 
  frog, 
  the 
  long 
  

   flat 
  cells 
  may 
  be 
  seen, 
  after 
  several 
  days' 
  maceration, 
  lying 
  on 
  the 
  primary 
  

   bundles. 
  

  

  5. 
  In 
  tendon, 
  flat 
  masses 
  of 
  cells 
  are 
  found, 
  on 
  the 
  third 
  to 
  fifth 
  day, 
  

   lying 
  on 
  the 
  edge 
  of 
  the 
  preparation 
  and 
  free 
  in 
  the 
  fluid. 
  The 
  cells 
  are 
  

   accurately 
  fitted 
  to 
  each 
  other, 
  after 
  the 
  manner 
  of 
  an 
  epithelium. 
  In 
  

   the 
  tendo 
  Achillis 
  of 
  the 
  frog 
  they 
  are 
  seen 
  of 
  three 
  sizes 
  : 
  — 
  (a) 
  large 
  

   cells, 
  corresponding 
  to 
  the 
  flat 
  cells 
  seen 
  on 
  the 
  surface 
  by 
  nitrate 
  of 
  

   silver 
  ; 
  (b) 
  smaller 
  quadrangular 
  cells, 
  similar 
  in 
  size 
  to 
  those 
  described 
  

   by 
  Eanvier, 
  and 
  which 
  have 
  been 
  described 
  by 
  the 
  author 
  as 
  investiug 
  the 
  

   secondary 
  and 
  tertiary 
  bundles 
  in 
  double 
  layers 
  ; 
  and 
  (c) 
  long, 
  narrow, 
  

   flat 
  cells, 
  similar 
  to 
  those 
  described 
  by 
  the 
  author 
  as 
  being 
  isolable 
  by 
  

   potash, 
  and 
  as 
  covering 
  the 
  primary 
  bundles. 
  

  

  The 
  masses 
  of 
  the 
  cells 
  of 
  the 
  surface, 
  and 
  of 
  the 
  secondary 
  and 
  ter- 
  

   tiary 
  bundles, 
  can 
  be 
  usually 
  seen 
  to 
  consist 
  of 
  a 
  double 
  layer 
  separated 
  by 
  

   a 
  very 
  thin 
  transparent 
  medium. 
  

  

  6. 
  The 
  perimysium 
  and 
  neurilemma 
  are 
  respectively 
  represented 
  by 
  a 
  

  

  Q 
  2 
  

  

  