﻿l^^O.] 
  BOTANICAL 
  GAZETTE. 
  

  

  299 
  

  

  in 
  them 
  free 
  parts. 
  It 
  sometimes 
  happens 
  that 
  they 
  become 
  

   detached 
  from 
  the 
  collodion 
  and 
  float 
  away. 
  In 
  this 
  case 
  the 
  

   section 
  can 
  be 
  collodionized 
  as 
  was 
  first 
  suggested 
  by 
  Dr. 
  

   Marks. 
  This 
  is 
  done 
  by 
  coating 
  the 
  tissue 
  before 
  each 
  sec- 
  

   tion 
  is 
  cut 
  with 
  a 
  thin 
  coat 
  of 
  i 
  % 
  collodion, 
  using 
  a 
  camel's 
  

   hair 
  brush 
  for 
  the 
  purpose. 
  Then 
  draw 
  the 
  knife 
  across 
  the 
  

   tissue 
  very 
  slowl}^ 
  keeping 
  alcohol 
  dripping 
  on 
  it 
  while 
  the 
  

   section 
  is 
  being 
  cut. 
  In 
  this 
  way 
  beautiful 
  longisections 
  of 
  

   large 
  compound 
  pistils 
  can 
  be 
  obtained 
  in 
  which 
  the 
  sections 
  

   of 
  ovules, 
  though 
  not 
  held 
  in 
  place 
  by 
  the 
  placenta, 
  will, 
  

   nevertheless, 
  remain 
  in 
  their 
  proper 
  position 
  and 
  perfect 
  serial 
  

   sections 
  of 
  each 
  ovule 
  obtained. 
  

  

  Care 
  should 
  be 
  taken 
  that 
  none 
  of 
  the 
  sections 
  be 
  cut 
  

   before 
  collodionization, 
  for 
  although 
  it 
  may 
  not 
  always 
  be 
  

   necessary 
  to 
  keep 
  the 
  parts 
  in 
  place, 
  yet 
  it 
  is 
  always 
  a 
  safe- 
  

   guard 
  against 
  their 
  displacement. 
  The 
  method 
  as 
  given 
  is 
  

   joiind 
  to 
  work 
  admirably 
  on 
  very 
  delicate 
  meristematic 
  tissue, 
  

   ^0 
  heat 
  being 
  required 
  the 
  most 
  delicate 
  of 
  tissue 
  will 
  not 
  

   shrink. 
  Then, 
  too, 
  the 
  shortness 
  of 
  the 
  method 
  commends 
  

   It 
  to 
  general 
  use. 
  I 
  find 
  that 
  2 
  days 
  or 
  even 
  ^6 
  hours 
  is 
  suf- 
  

   ncient 
  and 
  is 
  even 
  better 
  than 
  a 
  longer 
  time 
  to 
  go 
  through 
  

   the 
  whole 
  operation 
  of 
  hardening, 
  infiltrating 
  and 
  sectioning 
  

   nearly 
  all 
  kinds 
  of 
  plant 
  tissue. 
  The 
  material 
  may 
  appar- 
  

   ently 
  be 
  left 
  in 
  the 
  thick 
  collodion 
  indefinitely 
  without 
  deter- 
  

   iorating. 
  The 
  sections 
  after 
  being 
  cut 
  can 
  be 
  handled 
  with 
  

   a 
  camel's 
  hair 
  brush 
  without 
  danger 
  of 
  breaking. 
  By 
  a 
  

   ""le 
  experience 
  one 
  will 
  find 
  that 
  the 
  method 
  as 
  given 
  will 
  

   enable 
  him 
  to 
  bring 
  to 
  his 
  hand 
  material 
  with 
  which 
  to 
  pur- 
  

   sue 
  with 
  certainty 
  any 
  investigation 
  in 
  histological 
  botany. 
  

  

  Cornell 
  Universitv. 
  

  

  A 
  biographical 
  sketch 
  of 
  J. 
  B. 
  Ellis. 
  

  

  F. 
  W. 
  ANDERSON. 
  

  

  (with 
  portrait.!) 
  

  

  j^ 
  !^^^e 
  subject 
  of 
  the 
  present 
  sketch 
  was 
  born 
  at 
  Potsdam, 
  

   ne 
  V 
  J^"«'^ry 
  21, 
  1829. 
  He 
  evinced 
  a 
  remarkable 
  fond- 
  

   J^ss 
  tor 
  study 
  at 
  an 
  early 
  age, 
  and 
  the 
  time 
  not 
  spent 
  

   ina^ 
  A 
  °^" 
  ^^ 
  ^^'o^'^ 
  on 
  his 
  father's 
  farm 
  was 
  devoted 
  to 
  read- 
  

   Srn 
  1 
  t'\ 
  ^^^^ 
  '^ge 
  of 
  sixteen 
  he 
  taught 
  the 
  winter 
  school 
  at 
  

   ^jockholm, 
  St. 
  Lawrence 
  county. 
  Here 
  the 
  lad 
  received 
  

   p-;"%services 
  ten 
  dollars 
  a 
  month 
  and 
  "boarded 
  around. 
  

   ~!l^i_^^^e^tendollars 
  was 
  paid 
  in 
  cash, 
  the 
  other 
  five 
  was 
  

  

  % 
  mistake 
  of 
  binder 
  the 
  portrait 
  of 
  Mr. 
  Ellis 
  was 
  bound 
  with 
  the 
  October 
  G 
  

  

  \ 
  

  

  