﻿276 
  Drs. 
  Brimton 
  and 
  Fayrer 
  on 
  the 
  Physiological 
  [Feb, 
  18, 
  

  

  Experiment 
  XXIX. 
  

  

  j 
  of 
  a 
  grain 
  of 
  dried 
  cobra-poison 
  dissolved 
  in 
  distilled 
  water 
  was 
  

   injected 
  into 
  a 
  rabbit 
  with 
  the 
  hypodermic 
  syringe. 
  

  

  Symptoms 
  of 
  poisoning 
  were 
  rapidly 
  manifested. 
  A 
  tube 
  had 
  been 
  

   previously 
  introduced 
  into 
  the 
  trachea, 
  and 
  respiration 
  was 
  commenced 
  

   as 
  soon 
  as 
  poisoning 
  was 
  manifest. 
  

  

  Artificial 
  respiration, 
  with 
  oxygen 
  contained 
  in 
  a 
  large 
  bag, 
  was 
  steadily 
  

   continued 
  for 
  two 
  hours, 
  but 
  with 
  no 
  better 
  effect 
  than 
  in 
  other 
  similar 
  

   cases 
  where 
  atmospheric 
  air 
  was 
  used 
  for 
  the 
  same 
  purpose. 
  At 
  the 
  

   expiration 
  of 
  two 
  hours, 
  apparent 
  death 
  had 
  occurred 
  ; 
  the 
  heart 
  con- 
  

   tinued 
  to 
  beat 
  for 
  about 
  two 
  minutes 
  after 
  the 
  respiration 
  ceased. 
  

  

  Beyond 
  a 
  very 
  florid 
  condition 
  of 
  the 
  blood, 
  there 
  was 
  no 
  obvious 
  

   difference 
  between 
  the 
  effect 
  of 
  oxygen 
  and 
  that 
  of 
  common 
  air. 
  It 
  did 
  

   not 
  indeed 
  appear 
  that, 
  as 
  far 
  as 
  the 
  effects 
  produced 
  by 
  the 
  poison 
  were 
  

   concerned, 
  it 
  differed 
  in 
  its 
  action 
  from 
  common 
  air. 
  

  

  Experiment 
  XXX. 
  

   November 
  1874. 
  — 
  A 
  little 
  cobra-poison, 
  dissolved 
  in 
  water, 
  was 
  added 
  to 
  

   water 
  containing 
  some 
  cells 
  scraped 
  from 
  the 
  mantle 
  of 
  a 
  freshwater 
  

   mussel. 
  Among 
  these 
  was 
  a 
  large 
  ciliated 
  cell, 
  which, 
  before 
  the 
  addi- 
  

   tion 
  of 
  the 
  poison, 
  had 
  been 
  been 
  moving 
  slowly, 
  although 
  its 
  cilia 
  were 
  

   moving 
  actively. 
  Immediately 
  after 
  the 
  addition 
  of 
  the 
  poison 
  the 
  cell 
  

   began 
  to 
  spin 
  round 
  on 
  its 
  own 
  axis 
  with 
  extraordinary 
  rapidity. 
  In 
  

   about 
  three 
  or 
  four 
  minutes 
  its 
  motions 
  began 
  to 
  be 
  languid, 
  the 
  ciliary 
  

   motion 
  ceased, 
  the 
  cell 
  itself 
  elongated, 
  contracted, 
  and 
  then 
  slowly 
  

   resumed 
  its 
  former 
  shape 
  and 
  became 
  perfectly 
  motionless. 
  

  

  Experiment 
  XXXI. 
  

  

  "Water 
  from 
  the 
  interior 
  of 
  a 
  freshwater 
  mussel, 
  and 
  containing 
  

   two 
  specimens 
  of 
  Paramcecium 
  in 
  active 
  motion, 
  was 
  examined. 
  They 
  

   were 
  rotating 
  with 
  great 
  rapidity. 
  A 
  little 
  cobra-poison 
  diluted 
  with 
  

   water 
  was 
  added. 
  Three 
  minutes 
  after 
  the 
  addition 
  one 
  was 
  discovered 
  

   with 
  both 
  the 
  cilia 
  and 
  cell-body 
  perfectly 
  still. 
  The 
  cilia 
  of 
  the 
  other 
  

   were 
  still, 
  but 
  the 
  cell-body 
  was 
  contracted. 
  In 
  about 
  half 
  a 
  minute 
  

   more 
  it 
  expanded 
  to 
  its 
  normal 
  size 
  and 
  then 
  remained 
  perfectly 
  still. 
  

  

  Experiment 
  XXXII. 
  

  

  A 
  piece 
  taken 
  from 
  the 
  mantle 
  of 
  a 
  freshwater 
  mussel 
  was 
  placed 
  on 
  

   the 
  slide 
  and 
  examined 
  at 
  the 
  end 
  of 
  about 
  half 
  an 
  hour. 
  Active 
  ciliary 
  

   motion 
  could 
  be 
  observed 
  both 
  in 
  the 
  fringe 
  of 
  the 
  mantle 
  itself 
  and 
  in 
  

   several 
  specimens 
  of 
  Paramcecium. 
  A 
  little 
  dilute 
  poison 
  was 
  added. 
  

   At 
  first 
  the 
  ciliary 
  motion 
  seemed 
  increased, 
  but 
  in 
  about 
  two 
  minutes 
  it 
  

   became 
  slower, 
  and 
  in 
  six 
  had 
  become 
  very 
  languid, 
  and 
  in 
  ten 
  minutes 
  

   stopped 
  altogether 
  in 
  the 
  specimens 
  of 
  Paramecium, 
  but 
  still 
  continued 
  

   in 
  some 
  of 
  the 
  cilia 
  of 
  the 
  mantle. 
  

  

  