﻿310 
  

  

  Dr. 
  G. 
  Thin 
  on 
  Traumatic 
  

  

  [Mar. 
  11, 
  

  

  of 
  cornea- 
  substance 
  bounded 
  by 
  the 
  clefts 
  are 
  coloured 
  of 
  different 
  shades 
  

   by 
  chloride 
  of 
  gold, 
  the 
  difference 
  affecting 
  the 
  fibrillary 
  tissue, 
  and 
  more 
  

   markedly 
  the 
  spindle 
  cells. 
  

  

  The 
  serous 
  contents 
  of 
  the 
  interspaces 
  of 
  the 
  inflamed 
  cornea 
  differ 
  

   in 
  character 
  from 
  those 
  of 
  the 
  healthy 
  cornea, 
  inasmuch 
  as 
  the 
  former 
  

   show, 
  more 
  abundantly, 
  the 
  dark 
  granular 
  substance 
  which 
  results 
  from 
  

   the 
  reduction 
  of 
  the 
  chloride 
  of 
  gold. 
  

  

  In 
  a 
  very 
  early 
  stage 
  of 
  inflammation 
  (after 
  a 
  few 
  hours) 
  the 
  disten- 
  

   sion 
  of 
  the 
  narrow 
  spaces 
  between 
  the 
  primary 
  bundles 
  and 
  of 
  the 
  wider 
  

   and 
  more 
  yielding 
  spaces 
  between 
  the 
  lamellae, 
  corresponding 
  to 
  the 
  

   larger 
  bundles, 
  favours 
  the 
  action 
  of 
  chloride 
  of 
  gold 
  ; 
  and 
  preparations 
  

   can 
  thus 
  be 
  obtained 
  by 
  this 
  reagent 
  which 
  show 
  that 
  the 
  two 
  kinds 
  of 
  

   flat 
  cells 
  which 
  cover 
  the 
  respective 
  surfaces 
  are 
  arranged 
  after 
  the 
  

   manner 
  of 
  an 
  epithelium. 
  The 
  cells 
  thus 
  seen 
  can 
  be 
  identified 
  by 
  their 
  

   size, 
  contour, 
  and 
  arrangement 
  as 
  those 
  which 
  are 
  isolable 
  from 
  the 
  

   healthy 
  cornea 
  by 
  warm 
  saturated 
  solution 
  of 
  caustic 
  potash, 
  and 
  which 
  

   can 
  be 
  seen 
  in 
  preparations 
  sealed 
  up 
  in 
  aqueous 
  humour. 
  

  

  A 
  similar 
  distension 
  occasionally 
  permits 
  the 
  demonstration 
  of 
  the 
  

   layers 
  covering 
  the 
  secondary 
  bundles 
  of 
  tendon. 
  

  

  That 
  the 
  successful 
  gold 
  reaction, 
  in 
  such 
  cases, 
  is 
  probably 
  due 
  solely 
  

   to 
  the 
  distension 
  of 
  the 
  interspaces, 
  is 
  inferred 
  from 
  the 
  fact 
  that, 
  in 
  the 
  

   tendo 
  Achillis 
  of 
  frogs 
  which 
  have 
  died 
  from 
  disease 
  and 
  have 
  been 
  some 
  

   hours 
  in 
  water 
  after 
  death, 
  the 
  author 
  has 
  obtained 
  gold 
  preparations 
  

   showing 
  not 
  only 
  the 
  cells 
  of 
  the 
  secondary 
  bundles 
  (Eanvier's 
  cells), 
  but 
  

   also 
  small 
  groups 
  of 
  the 
  long 
  narrow 
  cells 
  which 
  cover 
  the 
  primary 
  

   bundles. 
  

  

  In 
  the 
  cauterized 
  frog's 
  cornea, 
  examined 
  in 
  blood-serum 
  after 
  twelve 
  

   hours' 
  inflammation, 
  portions 
  of 
  the 
  primary 
  bundles 
  are 
  found 
  lying 
  

   loose 
  on 
  the 
  surface. 
  These 
  detached 
  portions 
  have 
  a 
  nearly 
  constant 
  

   length, 
  a 
  uniform 
  breadth, 
  sharply 
  defined 
  even 
  borders, 
  are 
  sometimes 
  

   puckered 
  transversely, 
  occasionally 
  show 
  a 
  faint 
  appearance 
  of 
  longi- 
  

   tudinal 
  fibrillation, 
  and 
  are 
  sometimes 
  cut 
  transversely, 
  at 
  one 
  or 
  more 
  

   points, 
  by 
  straight 
  hyaline 
  lines. 
  They 
  resemble 
  accurately 
  the 
  primary 
  

   bundles 
  of 
  the 
  neurilemma 
  of 
  the 
  sciatie 
  nerve 
  and 
  the 
  rods 
  of 
  the 
  retina 
  

   of 
  the 
  healthy 
  frog. 
  

  

  They 
  stain 
  deeply 
  in 
  gold 
  preparations, 
  and 
  are 
  then 
  always 
  puckered 
  

   transversely. 
  

  

  In 
  gold 
  preparations 
  of 
  the 
  inflamed 
  frog's 
  tongue, 
  isolated 
  primary 
  

   bundles, 
  identical 
  in 
  appearance 
  and 
  breadth 
  with 
  those 
  of 
  the 
  inflamed 
  

   cornea, 
  are 
  to 
  be 
  found. 
  

  

  The 
  depth 
  of 
  staining 
  by 
  gold 
  shows 
  that 
  the 
  constituent 
  elements 
  of 
  

   the 
  primary 
  bundles 
  undergo 
  a 
  chemical 
  change 
  in 
  inflammation. 
  

  

  The 
  author 
  has 
  studied, 
  by 
  means 
  of 
  chloride 
  of 
  gold, 
  the 
  effects 
  of 
  in- 
  

   flammation 
  in 
  the 
  quadrangular 
  and 
  in 
  the 
  long 
  flat 
  cells 
  which 
  cover 
  

   the 
  bundles 
  in 
  the 
  interior 
  of 
  the 
  cornea, 
  but 
  chiefly 
  in 
  frog-cornese 
  sealed 
  

  

  