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  not 
  appear 
  to 
  have 
  suffered 
  though 
  planted 
  two 
  days 
  after 
  7 
  oz. 
  of 
  

   bisulphide 
  had 
  been 
  injected 
  in 
  the 
  square 
  yard. 
  Care 
  must 
  be 
  taken 
  

   not 
  to 
  operate 
  when 
  the 
  trees 
  are 
  in 
  blossom 
  or 
  when 
  the 
  fruits 
  are 
  

   nearly 
  ripe. 
  E. 
  Wolny 
  states 
  that 
  the 
  introduction 
  of 
  carbon 
  bisul- 
  

   phide 
  into 
  cultivated 
  soil 
  has 
  the 
  effect 
  of 
  either 
  completely 
  or 
  tem- 
  

   porarily 
  arresting 
  vegetation 
  and 
  diminishing 
  the 
  production 
  of 
  

   vegetable 
  matter. 
  It 
  is, 
  therefore, 
  necessary 
  to 
  keep 
  it 
  at 
  a 
  certain 
  

   distance 
  from 
  the 
  roots. 
  It 
  is 
  said 
  that 
  both 
  plants 
  and 
  pests 
  were 
  

   destroyed 
  by 
  an 
  injection 
  of 
  10 
  oz. 
  per 
  square 
  yard 
  against 
  the 
  nema- 
  

   todes 
  of 
  the 
  beet. 
  Against 
  this, 
  salads 
  are 
  stated 
  to 
  have 
  been 
  scarcely 
  

   withered 
  at 
  all 
  by 
  a 
  dose 
  of 
  3 
  oz., 
  and 
  growing 
  carnations 
  did 
  not 
  suffer 
  

   from 
  a 
  7 
  oz. 
  to 
  13 
  oz. 
  dose. 
  It 
  may 
  be 
  accepted 
  that 
  young 
  plants 
  

   are 
  generally 
  more 
  sensitive. 
  Gastine's 
  injector 
  (pal 
  injecteur) 
  is 
  the 
  

   instrument 
  used 
  for 
  piercing 
  the 
  holes 
  and 
  injecting 
  the 
  bisulphide. 
  

   One 
  stroke 
  of 
  the 
  piston 
  rod 
  injects 
  about 
  one-third 
  fluid 
  ounce, 
  which 
  

   is 
  measured 
  by 
  the 
  d 
  ameter 
  of 
  the 
  pump 
  chamber 
  and 
  the 
  stroke 
  of 
  

   the 
  piston. 
  By 
  packing 
  in 
  suitable 
  disks 
  the 
  stroke 
  is 
  reduced 
  and 
  doses 
  

   of 
  four-fifths, 
  three-fifths 
  and 
  two-fifths 
  of 
  the 
  above 
  are 
  obtainable. 
  

   In 
  all 
  cases 
  about 
  one-tenth 
  of 
  the 
  full 
  one-third 
  fluid 
  ounce 
  remains 
  

   in 
  the 
  chamber 
  and 
  this 
  must 
  be 
  allowed 
  for 
  by 
  adjusting 
  the 
  

   capacity 
  to 
  take 
  that 
  amount 
  extra. 
  When 
  the 
  operator 
  is 
  alone 
  

   he 
  withdraws 
  the 
  instrument 
  and 
  quickly 
  closes 
  the 
  hole 
  with 
  his 
  

   foot. 
  It 
  is, 
  however, 
  advisable 
  for 
  him 
  to 
  have 
  an 
  assistant 
  to 
  

   close 
  the 
  hole 
  with 
  a 
  suitable 
  instrument. 
  For 
  large 
  areas 
  a 
  

   plough, 
  such 
  as 
  that 
  of 
  Vernette 
  of 
  Beziers, 
  is 
  used. 
  The 
  character 
  

   of 
  the 
  soil 
  not 
  only 
  governs 
  the 
  quantity 
  of 
  bisulphide, 
  but 
  

   also 
  the 
  number 
  of 
  the 
  holes. 
  These 
  may 
  be 
  comparatively 
  few 
  and 
  

   far 
  between 
  in 
  the 
  case 
  of 
  light 
  soils 
  in 
  which 
  diffusion 
  is 
  easy. 
  The 
  

   converse 
  obtains 
  in 
  compact 
  soils, 
  and 
  double 
  the 
  number 
  of 
  holes 
  

   may 
  be 
  necessary 
  for 
  the 
  same 
  quantity 
  of 
  bisulphide. 
  In 
  dealing 
  

   with 
  Phylloxera 
  four 
  holes, 
  at 
  a 
  distance 
  of 
  about 
  12 
  inches 
  from 
  each 
  

   other, 
  give 
  good 
  results. 
  One 
  man 
  operating 
  alone 
  is 
  able 
  to 
  make 
  

   1,000 
  holes 
  per 
  day, 
  and 
  3,400 
  holes 
  may 
  be 
  made 
  if 
  he 
  has 
  an 
  assistant. 
  

   On 
  the 
  basis 
  of 
  five 
  holes 
  per 
  square 
  yard 
  some 
  20,000 
  holes 
  are 
  required 
  

   per 
  acre 
  and 
  if 
  a 
  man 
  can 
  make 
  about 
  1,360 
  holes 
  per 
  day 
  on 
  an 
  aver- 
  

   age, 
  the 
  acre 
  will 
  require 
  14 
  days. 
  Taking 
  wages 
  at 
  about 
  35. 
  per 
  day, 
  

   this 
  works 
  out 
  at 
  about 
  £2 
  per 
  acre 
  for 
  labour. 
  With 
  8 
  cwt. 
  of 
  carbon 
  

   bisulphide 
  per 
  acre 
  at 
  225. 
  per 
  cwt., 
  the 
  cost 
  per 
  acre 
  works 
  out 
  at 
  about 
  

   £9 
  per 
  acre 
  for 
  bisulphide. 
  At 
  the 
  present 
  time 
  the 
  price 
  of 
  bisulphide 
  

   is 
  higher. 
  The 
  author 
  mentions 
  that 
  for 
  small 
  areas, 
  such 
  as 
  gardens, 
  

   gelatine 
  capsules 
  containing 
  2, 
  3, 
  or 
  more 
  grammes 
  of 
  the 
  chemical 
  

   may 
  be 
  applied. 
  A 
  pointed 
  stick 
  forms 
  an 
  efficient 
  tool. 
  The 
  mix- 
  

   ture 
  of 
  carbon 
  bisulphide 
  fumes 
  with 
  atmospheric 
  air 
  forms 
  a 
  dangerous 
  

   detonating 
  compound 
  and 
  workmen 
  must 
  not 
  smoke. 
  Flinty 
  soils 
  

   may 
  cause 
  sparks 
  to 
  fly 
  when 
  the 
  tool 
  is 
  driven 
  in, 
  which 
  is 
  a 
  source 
  

   of 
  danger. 
  The 
  barrels 
  containing 
  the 
  bisulphide 
  are 
  best 
  stored 
  in 
  an 
  

   open 
  field 
  with 
  proper 
  protection 
  against 
  the 
  sun. 
  When 
  drawing 
  

   out 
  some 
  of 
  the 
  liquid 
  it 
  is 
  well 
  to 
  pour 
  in 
  a 
  little 
  water, 
  as 
  this 
  pre- 
  

   vents 
  the 
  space 
  left 
  empty 
  from 
  filling 
  with 
  fumes. 
  A 
  greased 
  sounding 
  

   rod 
  will 
  serve 
  to 
  show 
  how 
  much 
  of 
  the 
  liquid 
  remains 
  in 
  the 
  container, 
  

   as 
  the 
  grease 
  will 
  be 
  dissolved 
  where 
  wetted 
  by 
  the 
  bisulphide. 
  Empty 
  

   containers 
  must 
  be 
  left 
  open 
  for 
  a 
  couple 
  of 
  days 
  to 
  permit 
  all 
  traces 
  

   of 
  bisulphide 
  to 
  evaporate 
  before 
  the 
  bungs 
  are 
  replaced. 
  

  

  