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  Vice- 
  Admiral 
  E. 
  Ommanney 
  

  

  [Mar. 
  11, 
  

  

  has 
  found 
  special 
  advantages 
  from 
  the 
  use 
  of 
  osrriic 
  acid, 
  with 
  or 
  without 
  

   subsequent 
  staining 
  in 
  hematoxylin. 
  The 
  stages 
  in 
  this 
  formation 
  are 
  

   as 
  follows 
  : 
  — 
  

  

  (a) 
  The 
  spindle 
  cells 
  enlarge 
  and 
  contain 
  several 
  nuclei 
  which 
  can 
  be 
  

   identified, 
  wmilst 
  within 
  the 
  cell, 
  as 
  being 
  of 
  a 
  similar 
  nature 
  to 
  red 
  blood- 
  

   corpuscles. 
  A 
  current 
  of 
  blood-plasma 
  from 
  the 
  nearest 
  vessels 
  passes, 
  at 
  

   the 
  same 
  time, 
  into 
  the 
  interfibrillary 
  space 
  in 
  which 
  the 
  spindle 
  cells 
  lie. 
  

  

  (6) 
  The 
  nuclei 
  escape 
  from 
  the 
  spindle 
  cells 
  into 
  this 
  space, 
  where 
  

   they 
  are 
  indistinguishable 
  in 
  appearance 
  from 
  the 
  ordinary 
  red 
  blood- 
  

   corpuscles. 
  

  

  (c) 
  By 
  a 
  process 
  of 
  diapedesis 
  the 
  formed 
  elements 
  of 
  the 
  nearest 
  

   blood-vessels 
  pass 
  into 
  this 
  space 
  and 
  the 
  circulation 
  is 
  established. 
  

  

  Various 
  appearances 
  lead 
  the 
  author 
  to 
  suppose 
  that 
  the 
  fibrine 
  of 
  

   the 
  plasma 
  solidifies 
  on 
  the 
  outer 
  surface 
  of 
  the 
  current 
  and 
  forms 
  the 
  

   substratum 
  of 
  the 
  new 
  vessel, 
  and 
  on 
  this 
  substratum 
  the 
  white 
  blood- 
  

   corpuscles 
  fix 
  themselves 
  and 
  spread 
  out 
  as 
  an 
  epithelium. 
  

  

  Prom 
  interfibrillary 
  spaces 
  in 
  the 
  inflamed 
  cornea, 
  in 
  which 
  formation 
  

   of 
  blood-vessels 
  was 
  actively 
  takiug 
  place, 
  the 
  author 
  has 
  isolated 
  white 
  

   corpuscles 
  in 
  various 
  transition 
  stages 
  towards 
  the 
  appearance 
  and 
  shape 
  

   of 
  epithelium 
  ; 
  and, 
  from 
  rapidly 
  enlarging 
  vessels, 
  cells 
  which, 
  from 
  their 
  

   form, 
  he 
  believes 
  to 
  be 
  transitionary 
  to 
  that 
  of 
  smooth 
  muscular 
  fibre. 
  

  

  As 
  the 
  new 
  capillary 
  forms, 
  the 
  enlarged 
  spindle 
  cells 
  decrease 
  to 
  their 
  

   ordinary 
  size. 
  m 
  

  

  In 
  preparations 
  of 
  blood-serum 
  of 
  the 
  frog 
  sealed 
  up, 
  after 
  a 
  few 
  days, 
  

   the 
  haemoglobin 
  may 
  be 
  observed 
  to 
  assume 
  special 
  forms 
  inside 
  the 
  cor- 
  

   puscle, 
  or 
  to 
  disappear 
  from 
  it, 
  and 
  so 
  produce 
  changes 
  in 
  the 
  appear- 
  

   ance 
  of 
  the 
  corpuscle 
  identical 
  with 
  those 
  described 
  by 
  Arnold 
  as 
  taking 
  

   place 
  in 
  the 
  tongue 
  of 
  the 
  living 
  animal 
  after 
  diapedesis. 
  

  

  The 
  above 
  observations 
  were 
  made 
  chiefly 
  on 
  the 
  cornea 
  of 
  the 
  frog 
  and 
  

   rabbit 
  ; 
  and 
  the 
  inflammation 
  was 
  mostly 
  produced 
  by 
  solid 
  nitrate 
  of 
  

   silver, 
  the 
  passing 
  of 
  a 
  thread, 
  and 
  the 
  application 
  of 
  methylated 
  alcohol. 
  

  

  In 
  the 
  winter 
  frog 
  (Rana 
  esculenta), 
  cauterized 
  in 
  the 
  centre 
  of 
  the 
  

   cornea, 
  the 
  first 
  entry 
  of 
  white 
  corpuscles 
  attributable 
  to 
  inflammation 
  

   was 
  observed, 
  after 
  48 
  hours, 
  in 
  the 
  wider 
  spaces 
  near 
  the 
  limbus. 
  After 
  

   4 
  days, 
  they 
  could 
  be 
  observed 
  in 
  considerable 
  numbers, 
  and 
  2-6 
  could 
  be 
  

   seen 
  in 
  one 
  so-called 
  space 
  (lacuna). 
  

  

  II. 
  " 
  Report 
  on 
  Observations 
  of 
  the 
  Transit 
  of 
  Venus 
  made 
  at 
  

   Luxor, 
  Upper 
  Egypt, 
  9th 
  December, 
  1874." 
  By 
  Vice- 
  

   Admiral 
  E. 
  Ommanney, 
  C.B., 
  F.R.S. 
  Received 
  February 
  11, 
  

   1875. 
  

  

  Owing 
  to 
  the 
  kindness 
  of 
  Professor 
  Auwers, 
  of 
  Berlin, 
  who 
  placed 
  his 
  

   heliometer 
  at 
  my 
  service, 
  I 
  was 
  enabled 
  to 
  make 
  the 
  following 
  notes 
  of 
  

   time 
  and 
  phenomena 
  during 
  the 
  time 
  of 
  egress. 
  

  

  