﻿272 
  Drs. 
  Brunton 
  and 
  Fayrer 
  on 
  the 
  Physiological 
  [Feb. 
  18, 
  

  

  4.38. 
  Circulation 
  continues 
  at 
  same 
  rate. 
  

  

  4.42. 
  Same 
  rate. 
  

  

  4.45. 
  It 
  becomes 
  more 
  languid. 
  

  

  4.48. 
  Circulation 
  has 
  ceased, 
  but 
  yet 
  there 
  is 
  no 
  marked 
  extravasation. 
  

  

  Experiment 
  XVII. 
  

  

  Another 
  portion 
  of 
  the 
  same 
  mesentery 
  had 
  cobra-poison 
  applied, 
  but 
  

   after 
  half 
  an 
  hour 
  there 
  was 
  no 
  sign 
  of 
  extravasation. 
  

  

  Experiment 
  XYIII. 
  

  

  A 
  fresh 
  piece 
  of 
  mesentery 
  exposed 
  of 
  same 
  cat, 
  and 
  diluted 
  Crotalus- 
  

   poison 
  applied 
  at 
  4.52 
  p.m. 
  

  

  The 
  circulation 
  was 
  rather 
  languid 
  at 
  the 
  time, 
  and 
  apparently 
  became 
  

   more 
  languid. 
  

  

  At 
  4.58 
  no 
  extravasation 
  had 
  taken 
  place, 
  the 
  blood 
  flowing 
  very 
  lan- 
  

   guidly. 
  

  

  5.15. 
  Circulation 
  still 
  going 
  on, 
  but 
  very 
  slowly 
  ; 
  no 
  extravasation 
  ; 
  it 
  

   soon 
  after 
  ceased. 
  

  

  Experiment 
  XIX. 
  

  

  At 
  5.20 
  p.m. 
  a 
  fresh 
  portion 
  of 
  the 
  mesentery 
  was 
  exposed 
  ; 
  to 
  one 
  

   part 
  cobra- 
  and 
  to 
  the 
  other 
  Crotalus-j)ois<m 
  was 
  applied, 
  and 
  the 
  effect 
  

   was 
  watched 
  with 
  the 
  naked 
  eye. 
  

  

  5.45. 
  JN"o 
  extravasation 
  visible. 
  

  

  At 
  6.15 
  p.m. 
  slight 
  extravasation 
  equally 
  visible 
  on 
  both. 
  

  

  Experiment 
  XX. 
  

  

  August 
  2oth, 
  1874. 
  — 
  At 
  2 
  p.m. 
  a 
  young 
  cat 
  was 
  chloralized. 
  The 
  me- 
  

   sentery 
  was 
  drawn 
  out 
  and 
  a 
  part 
  treated 
  with 
  cobra-poison, 
  another 
  part 
  

   with 
  Crotalus-ipoisoTi. 
  

  

  At 
  5 
  p.m. 
  On 
  examination, 
  that 
  under 
  the 
  influence 
  of 
  the 
  Crotalus- 
  

   poison 
  was 
  found 
  deeply 
  congested 
  and 
  reddened 
  with 
  blood, 
  extravasated 
  

   in 
  the 
  course 
  of 
  the 
  small 
  vessels, 
  forming 
  a 
  well-marked 
  redness 
  to 
  the 
  

   naked 
  eye. 
  Under 
  the 
  microscope 
  the 
  red 
  corpuscles 
  were 
  seen 
  in 
  numbers 
  

   outside 
  the 
  vessels. 
  Circulation 
  still 
  going 
  on 
  vigorously. 
  That 
  part 
  

   treated 
  with 
  cobra-poison 
  was 
  barely 
  altered, 
  but, 
  on 
  close 
  examination, 
  

   slight 
  patches 
  of 
  extravasation 
  were 
  seen 
  in 
  the 
  course 
  of 
  the 
  vessels. 
  

  

  The 
  difference 
  was 
  well 
  marked 
  between 
  the 
  two 
  — 
  the 
  extravasation 
  

   produced 
  by 
  Crotalus-xeiiom 
  being 
  well 
  marked, 
  that 
  by 
  cobra-venom 
  

   scarcely 
  perceptible. 
  In 
  both 
  cases 
  the 
  microscope 
  showed 
  red 
  corpuscles 
  

   outside 
  the 
  vessels. 
  

  

  These 
  experiments 
  show 
  that 
  Crotalus-^ohon 
  causes 
  haemorrhage 
  and 
  

   haernorrhagic 
  effusions 
  more 
  than 
  the 
  cobra-poison 
  does. 
  

  

  The 
  following 
  experiments 
  were 
  made, 
  at 
  the 
  suggestion 
  of 
  Mr. 
  Darwin, 
  

  

  