﻿464 
  

  

  J. 
  W. 
  JENKINSON. 
  

  

  tiou 
  of 
  gelatin 
  ; 
  Avlietlier 
  this 
  solution 
  is 
  wholly 
  liquid 
  or 
  

   contains 
  solid 
  matter 
  I 
  must 
  leave 
  it 
  to 
  the 
  physicists 
  to 
  

   decide, 
  but 
  it 
  seemed 
  to 
  me 
  to 
  be 
  a 
  fluid 
  containing 
  some 
  

   solid 
  in 
  suspension. 
  The 
  picric 
  acid 
  sinks 
  but 
  slowly, 
  and 
  

   gives 
  off 
  tubes 
  in 
  the 
  bulk 
  of 
  the 
  fluid. 
  

  

  In 
  a 
  I- 
  per 
  cent, 
  solution 
  of 
  gelatin 
  set 
  to 
  a 
  jelly, 
  which, 
  as 
  

   Hardy 
  has 
  shown, 
  contains 
  liquid 
  and 
  solid 
  side 
  by 
  side, 
  

  

  Fig. 
  D. 
  — 
  riiot,oi;;rapli 
  of 
  an 
  aitificial 
  spindle 
  made 
  witli 
  glacial 
  

   acttic 
  acid 
  in 
  a 
  film 
  of 
  egg-yolk 
  on 
  a 
  slide. 
  Note 
  the 
  equatorial 
  

   plate. 
  

  

  drops 
  of 
  1 
  per 
  cent, 
  chromic 
  and 
  saturated 
  ammonium 
  

   sulphate 
  .sink 
  partially 
  below 
  the 
  surface; 
  radial 
  tubes 
  are 
  

   given 
  off 
  in 
  all 
  directions 
  from 
  the 
  underside 
  of 
  the 
  drops. 
  

   Other 
  substances 
  give 
  results 
  ; 
  they 
  are 
  not, 
  however, 
  nearly 
  

   so 
  good. 
  

  

  This 
  led 
  me 
  to 
  make 
  a 
  few 
  experiments 
  with 
  fluids 
  in 
  

   which 
  solid 
  particles 
  are 
  suspended. 
  I 
  have 
  tried 
  albumen 
  

  

  