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  Scientific 
  Intelligence. 
  

  

  yet 
  sufficient 
  deformation, 
  and 
  produces 
  a 
  curvature 
  of 
  the 
  fila- 
  

   ment 
  toward 
  the 
  interior 
  of 
  the 
  flower. 
  

  

  The 
  contractile 
  movements 
  of 
  these 
  cells 
  are 
  very 
  rapid. 
  They 
  

   demand 
  for 
  their 
  manifestation 
  perfect 
  integrity 
  of 
  the 
  tissue. 
  

   When 
  the 
  tissue 
  is 
  acted 
  on 
  by 
  Osmic 
  acid, 
  for 
  fixation 
  of 
  the 
  

   contents 
  of 
  the 
  cells, 
  it 
  presents 
  totally 
  different 
  appearances 
  

   according 
  to 
  the 
  phase 
  of 
  activity 
  immediately 
  preceding 
  the 
  

   employment 
  of 
  the 
  reagent. 
  In 
  a 
  state 
  of 
  rest, 
  the 
  protoplasm 
  forms 
  

   a 
  dark 
  band 
  at 
  the 
  bottom 
  of 
  each 
  motile 
  cell. 
  When 
  the 
  fila- 
  

   ment 
  is 
  cut 
  longitudinally, 
  these 
  bands 
  give 
  the 
  impresssion 
  of 
  a 
  

   sort 
  of 
  ribbon, 
  as 
  long 
  as 
  the 
  sensitive 
  portion. 
  But 
  if 
  the 
  fila- 
  

   ment 
  was 
  in 
  a 
  state 
  of 
  tension 
  when 
  it 
  was 
  fixed, 
  these 
  bands 
  are 
  

   more 
  or 
  less 
  detached 
  and 
  curved, 
  and 
  present 
  an 
  undulating 
  

   appearance. 
  These 
  colored 
  and 
  fixed 
  segments 
  of 
  protoplasm 
  are 
  

   very 
  distinct 
  from 
  the 
  rest 
  of 
  the 
  cell 
  contents, 
  and 
  can 
  be 
  readily 
  

   photographed. 
  

  

  These 
  intracellular 
  changes 
  had 
  been 
  previously 
  noticed, 
  but 
  

   had 
  been 
  regarded 
  as 
  enlargements 
  and 
  diminutions 
  of 
  an 
  inter- 
  

   cellular 
  substance 
  readily 
  susceptible 
  to 
  changes 
  in 
  the 
  amount 
  of 
  

   water 
  in 
  the 
  cell. 
  g. 
  l. 
  g. 
  

  

  2. 
  The 
  Harvard 
  Botanical 
  Museum. 
  — 
  The 
  accuracy 
  of 
  the 
  

   glass 
  models 
  of 
  plants 
  and 
  the 
  analytical 
  details 
  of 
  their 
  flowers, 
  

   made 
  by 
  the 
  botanical 
  artists, 
  Messrs. 
  L. 
  and 
  R. 
  Blaschka, 
  has 
  

   rendered 
  it 
  possible 
  to 
  exhibit 
  all 
  the 
  morphological 
  relations 
  of 
  

   more 
  than 
  two 
  hundred 
  North 
  American 
  genera. 
  Above 
  four 
  

   hundred 
  species 
  from 
  North, 
  South, 
  and 
  Central 
  America 
  are 
  now 
  

   arranged 
  in 
  such 
  order 
  as 
  to 
  display 
  affinities 
  in 
  a 
  manner 
  per- 
  

   fectly 
  intelligible 
  to 
  every 
  observant 
  visitor. 
  The 
  minutest 
  details 
  

   are 
  given 
  on 
  an 
  enlarged 
  scale, 
  so 
  that 
  the 
  position 
  and 
  character 
  

   of 
  the 
  embryo 
  in 
  even 
  the 
  smallest 
  seeds 
  are 
  fully 
  and 
  faithfully 
  

   presented. 
  All 
  peculiarities 
  of 
  the 
  essential 
  organs 
  and 
  floral 
  

   envelopes 
  are 
  displayed 
  with 
  absolute 
  fidelity. 
  

  

  The 
  success 
  attending 
  this 
  venture 
  has 
  encouraged 
  the 
  installa- 
  

   tion 
  of 
  other 
  specimens 
  illustrating 
  all 
  the 
  relations 
  of 
  plants 
  to 
  

   their 
  surroundings, 
  and 
  to 
  animals 
  ; 
  in 
  short, 
  a 
  full 
  presentation 
  of 
  

   the 
  Biological 
  features 
  of 
  vegetation. 
  In 
  this 
  biological 
  section, 
  

   the 
  department 
  of 
  economic 
  botany 
  has, 
  of 
  course, 
  its 
  proper 
  place 
  

   and 
  is 
  to 
  claim 
  its 
  proportion 
  of 
  space. 
  The 
  cooperation 
  of 
  the 
  

   Director 
  of 
  the 
  Museum 
  of 
  Comparative 
  Zoology, 
  at 
  Cambridge, 
  

   of 
  the 
  Director 
  of 
  the 
  new 
  Museums 
  at 
  Philadelphia, 
  and 
  of 
  the 
  

   Curator 
  of 
  the 
  Peabody 
  Museum, 
  places 
  in 
  hand 
  sufficient 
  material 
  

   for 
  the 
  realization 
  of 
  this 
  comprehensive 
  scheme, 
  so 
  far 
  as 
  the 
  

   Phanerogams 
  are 
  concerned. 
  In 
  the 
  installation 
  of 
  the 
  Crypto- 
  

   gamia, 
  Professors 
  Farlow 
  and 
  Thaxter 
  have 
  given 
  indispensable 
  

   assistance, 
  and 
  some 
  of 
  their 
  specimens 
  are 
  already 
  in 
  the 
  cases. 
  

  

  From 
  present 
  appearances 
  about 
  two 
  years 
  will 
  elapse 
  before 
  

   all 
  the 
  relations 
  of 
  plants 
  to 
  their 
  environment 
  can 
  be 
  satisfacto- 
  

   rily 
  exhibited, 
  but 
  the 
  systematic 
  and 
  economic 
  departments 
  are 
  

   now 
  open. 
  The 
  phytopalgeontological 
  exhibit 
  will 
  be 
  in 
  the 
  

   same 
  building, 
  but 
  on 
  a 
  lower 
  floor. 
  g. 
  l. 
  g. 
  

  

  