﻿342 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Prof. 
  W. 
  G. 
  Johnson 
  in 
  Maryland, 
  are 
  substantially 
  as 
  follows 
  : 
  A 
  good 
  

   frame, 
  covered 
  outside 
  with 
  11^x12 
  inch 
  Virginia 
  pine 
  boards 
  and 
  

   1)^x4 
  inch 
  batting. 
  The 
  interior, 
  including 
  the 
  floor, 
  was 
  lined 
  with 
  

   two-ply 
  cyclone 
  paper, 
  over 
  which 
  four 
  inch 
  flooring 
  was 
  laid. 
  The 
  

   doors 
  should 
  be 
  made 
  double, 
  refrigerator 
  style, 
  hung 
  with 
  heavy 
  hinges 
  

   and 
  with 
  bolts 
  at 
  top 
  and 
  bottom 
  and 
  a 
  lock 
  in 
  the 
  middle. 
  There 
  should 
  

   be 
  a 
  second 
  opening 
  either 
  on 
  the 
  sideor 
  roof 
  so 
  as 
  to 
  permit 
  ready 
  ventila- 
  

   tion. 
  Trees 
  fumigated 
  in 
  a 
  freight 
  car 
  are 
  very 
  liable 
  to 
  serious 
  injury, 
  

   and 
  it 
  should 
  not 
  be 
  attempted. 
  A 
  second 
  fumigation 
  should 
  be 
  avoided 
  

   as 
  the 
  trees 
  may 
  be 
  much 
  damaged. 
  A 
  small 
  room 
  about 
  4x5x7 
  is 
  ex- 
  

   ceedingly 
  convenient, 
  even 
  when 
  there 
  is 
  a 
  large 
  one, 
  as 
  it 
  economizes 
  

   chemicals 
  in 
  the 
  fumigation 
  of 
  small 
  lots 
  of 
  trees. 
  

  

  The 
  cubic 
  contents 
  of 
  a 
  room 
  should 
  be 
  carefully 
  calculated 
  and 
  the 
  

   necessary 
  chemicals 
  measured 
  out. 
  Ordinary 
  dormant 
  nursery 
  stock 
  

   will 
  stand 
  i|- 
  ounces 
  (avoirdupois) 
  of 
  potassium 
  cyanid 
  (98% 
  pure) 
  to 
  

   100 
  cubic 
  feet 
  of 
  space, 
  according 
  to 
  Mr 
  Sirrine, 
  while 
  for 
  immature 
  

   stock, 
  bud 
  sticks, 
  etc. 
  but 
  f 
  ounce 
  should 
  be 
  used. 
  Prof. 
  Sirrine 
  recom- 
  

   mends 
  the 
  following 
  proportion 
  : 
  i|- 
  ounces 
  cyanid, 
  if-i^- 
  fluid 
  ounces 
  

   sulfuric 
  acid 
  and 
  4.^ 
  fluid 
  ounces 
  water 
  for 
  matured 
  stock, 
  and 
  f 
  ounce 
  

   cyanid, 
  f 
  fluid 
  ounce 
  acid 
  and 
  2^ 
  fluid 
  ounces 
  water 
  for 
  immature 
  

   stock. 
  Allow 
  the 
  gas 
  to 
  act 
  from 
  40 
  to 
  60 
  minutes. 
  I 
  have 
  obtained 
  

   very 
  satisfactory 
  results 
  with 
  the 
  formula 
  given 
  under 
  orchard 
  fumiga- 
  

   tion 
  ; 
  but 
  this 
  latter 
  is 
  undoubtedly 
  good 
  and 
  possibly 
  more 
  economical. 
  

   Trees 
  in 
  leaf 
  or 
  those 
  with 
  buds 
  started 
  can 
  not 
  be 
  fumigated 
  with 
  safety. 
  

   The 
  cost 
  of 
  fumigating 
  nursery 
  stock 
  is 
  very 
  sHght, 
  One 
  man 
  constructed 
  

   a 
  house 
  large 
  enough 
  to 
  accommodate 
  8000 
  trees 
  of 
  first 
  class 
  size 
  at 
  an 
  

   expense 
  not 
  to 
  exceed 
  $30. 
  A 
  person 
  with 
  considerable 
  experience 
  in 
  

   this 
  line 
  finds 
  that 
  trees 
  can 
  be 
  fumigated 
  in 
  quantity 
  at 
  less 
  than 
  ^c 
  

   apiece. 
  

  

  Great 
  care 
  should 
  be 
  exercised 
  in 
  this 
  work 
  as 
  well 
  as 
  when 
  treating 
  

   orchard 
  trees. 
  Special 
  pains 
  should 
  be 
  taken 
  to 
  air 
  the 
  fumigating 
  room 
  

   thoroughly 
  before 
  allowing 
  any 
  person 
  to 
  enter. 
  The 
  doors 
  should 
  be 
  

   open 
  at 
  least 
  10 
  minutes. 
  This 
  gas 
  is 
  very 
  deadly, 
  nearly 
  odorless 
  and 
  

   too 
  much 
  care 
  can 
  not 
  be 
  exercised. 
  

  

  