﻿1874-.] 
  

  

  Magnetic 
  Conditions 
  of 
  the 
  Blood. 
  

  

  119 
  

  

  attached 
  to 
  the 
  bottom 
  of 
  one 
  of 
  the 
  store 
  bottles, 
  and 
  then 
  removing 
  

   the 
  clips, 
  which 
  were 
  replaced 
  as 
  soon 
  as 
  the 
  tube 
  (fig. 
  1) 
  was 
  thoroughly 
  

   filled 
  : 
  the 
  open 
  tube 
  (b) 
  was 
  then 
  speedily 
  tied 
  over 
  with 
  the 
  thin 
  india 
  

   rubber 
  ; 
  the 
  india-rubber 
  tubing 
  connecting 
  it 
  with 
  the 
  store 
  bottle 
  was 
  

   then 
  carefully 
  removed, 
  and 
  the 
  aperture 
  (a) 
  tied 
  over 
  in 
  the 
  same 
  man- 
  

   ner; 
  the 
  tube 
  was 
  then 
  carefully 
  wiped 
  and 
  attached 
  by 
  the 
  suspendiug 
  

   silk 
  to 
  the 
  crook 
  of 
  the 
  ad 
  justing- 
  wire. 
  

  

  The 
  tube 
  (fig. 
  1) 
  was 
  first 
  filled 
  with 
  arterial 
  blood, 
  and 
  the 
  vessel 
  

   (fig. 
  2) 
  having 
  been 
  filled 
  with 
  carbonic 
  acid 
  gas 
  and 
  placed 
  between 
  the 
  

   poles 
  of 
  the 
  passive 
  electromagnet, 
  the 
  cork 
  with 
  testing-tube 
  attached, 
  

   filled 
  as 
  above 
  described, 
  was 
  properly 
  inserted 
  ; 
  by 
  means 
  of 
  the 
  adjust- 
  

   ing-wire 
  (fig. 
  3) 
  the 
  points 
  of 
  the 
  tube 
  were 
  made 
  level 
  with 
  the 
  points 
  

   of 
  the 
  magnetic 
  poles 
  ; 
  battery 
  contact 
  was 
  then 
  made, 
  and 
  the 
  tube 
  

   (fig. 
  1) 
  took 
  up 
  a 
  diagonal 
  position, 
  pointing 
  north-east 
  by 
  east 
  and 
  

   south-west 
  by 
  west. 
  The 
  tube 
  connected 
  with 
  the 
  bottom 
  of 
  the 
  store 
  

   bottle 
  containing 
  venous 
  blood 
  was 
  now 
  connected 
  with 
  one 
  of 
  the 
  glass 
  

   tubes 
  of 
  the 
  vessel 
  (fig. 
  2) 
  ; 
  and 
  the 
  clips 
  being 
  again 
  removed, 
  sufficient 
  

   venous 
  blood 
  was 
  allowed 
  to 
  run 
  into 
  it 
  to 
  cover 
  the 
  tube 
  (fig. 
  1), 
  with 
  

   the 
  exception 
  of 
  the 
  two 
  apertures 
  covered 
  with 
  india 
  rubber, 
  as 
  these 
  

   marked 
  the 
  position 
  of 
  the 
  tube 
  when 
  immersed 
  in 
  the 
  blood. 
  The 
  tube 
  

   immediately 
  assumed 
  the 
  direct 
  axial 
  line, 
  then 
  slowly 
  made 
  a 
  half 
  turn 
  

   and 
  took 
  the 
  axial 
  position 
  again, 
  the 
  ends 
  of 
  the 
  tube 
  being 
  directed 
  to 
  

   the 
  poles 
  of 
  the 
  magnet, 
  the 
  reverse 
  of 
  that 
  they 
  had 
  first 
  assumed. 
  

  

  Experiment 
  No. 
  2. 
  

   The 
  suspending-tube 
  was 
  now 
  removed 
  and 
  thoroughly 
  emptied 
  of 
  its 
  

   contents. 
  It 
  was 
  then 
  filled 
  with 
  venous 
  blood 
  in 
  the 
  manner 
  described 
  

   in 
  Experiment 
  No. 
  1, 
  and 
  suspended 
  as 
  before, 
  with 
  the 
  exception 
  that 
  

   the 
  vessel 
  (fig. 
  2) 
  w 
  T 
  as 
  this 
  time 
  filled 
  with 
  atmospheric 
  air 
  instead 
  of 
  car- 
  

   bonic 
  acid 
  gas 
  ; 
  the 
  tube 
  was 
  then 
  levelled 
  and 
  tested 
  by 
  battery 
  con- 
  

   tact 
  being 
  made 
  as 
  in 
  No. 
  1, 
  and 
  found 
  to 
  occupy 
  an 
  equatorial 
  position. 
  

   Arterial 
  blood 
  was 
  then 
  allowed 
  to 
  flow 
  into 
  fig. 
  2 
  from 
  the 
  store 
  bottle 
  

   in 
  the 
  same 
  manner 
  as 
  described 
  in 
  Experiment 
  No. 
  1 
  ; 
  the 
  slight 
  oscil- 
  

   lations 
  which 
  had 
  previously 
  existed 
  immediately 
  ceased, 
  and 
  the 
  vessel 
  

   (fig. 
  1) 
  came 
  to 
  rest 
  in 
  the 
  equatorial 
  line. 
  

  

  Observations. 
  

  

  Eor 
  the 
  proper 
  performance 
  of 
  these 
  experiments 
  special 
  attention 
  

   should 
  be 
  given, 
  

  

  1st, 
  to 
  the 
  proper 
  coagulation 
  and 
  removal 
  of 
  the 
  fibrin 
  ; 
  

  

  2nd, 
  to 
  the 
  preparation 
  of 
  the 
  blood 
  without 
  contact 
  with 
  the 
  atmo- 
  

   sphere 
  ; 
  

  

  3rd, 
  to 
  the 
  employment 
  of 
  sufficient 
  battery 
  force, 
  not 
  less 
  than 
  15 
  

   Grove's 
  cells. 
  

  

  1st. 
  It 
  is 
  very 
  necessary 
  that 
  the 
  fibrin 
  be 
  properly 
  removed, 
  for 
  the 
  

   liquor 
  sanguinis 
  and 
  corpuscles 
  constitute 
  together 
  a 
  medium 
  of 
  con- 
  

  

  