﻿— 
  41 
  — 
  

  

  Three 
  small 
  sets 
  of 
  experiments 
  were 
  made 
  with 
  meclianical 
  mix- 
  

   tures 
  of 
  kerosene 
  and 
  water, 
  the 
  Success 
  sprayer 
  and 
  the 
  Bordeaux 
  noz- 
  

   zle 
  being 
  used. 
  Mixtures 
  containing 
  five, 
  fifteen, 
  and 
  twenty 
  per 
  cent, 
  

   of 
  kerosene 
  so 
  applied 
  did 
  not 
  hurt 
  the 
  trees 
  and 
  neither 
  did 
  they 
  kill 
  

   all 
  the 
  scales. 
  A 
  thirty 
  per 
  cent, 
  mixture 
  applied 
  to 
  a 
  single 
  tree 
  July 
  

   6th 
  killed 
  very 
  nearly 
  all 
  the 
  scales 
  (living 
  individuals 
  being 
  very 
  rare), 
  

   and 
  did 
  not 
  visibly 
  hurt 
  the 
  tree 
  This 
  was, 
  however, 
  so 
  nearly 
  dead 
  

   from 
  scale-attack 
  that 
  the 
  effect 
  of 
  the 
  spraying 
  was 
  left 
  somewhat 
  in 
  

   doubt. 
  

  

  Tests 
  of 
  the 
  "Success 
  Kerosene 
  Sprayer," 
  bought 
  of 
  the 
  Deming 
  

   Company, 
  Salem, 
  Ohio, 
  made 
  with 
  a 
  view 
  to 
  determining 
  the 
  accuracy 
  

   of 
  the 
  percentage 
  indications 
  of 
  the 
  scale, 
  gave 
  results 
  showing 
  that 
  the 
  

   percentages 
  varied 
  considerably 
  according 
  to 
  the 
  action 
  of 
  the 
  pump 
  

   and 
  the 
  fineness 
  of 
  the 
  spray. 
  With 
  the 
  indicator 
  of 
  the 
  dial 
  set 
  at 
  io% 
  

   the 
  amount 
  of 
  kerosene 
  in 
  the 
  mixture 
  would 
  vary 
  from 
  7.5% 
  to 
  13. 
  13%, 
  

   tlie 
  lower 
  percentage 
  when 
  the 
  pump 
  was 
  vigorously 
  worked 
  with 
  a 
  very 
  

   fine 
  spray, 
  and 
  the 
  higher 
  when 
  it 
  was 
  vigorously 
  worked 
  with 
  an 
  open 
  

   stream. 
  With 
  a 
  fairly 
  fine 
  spray 
  and 
  moderate 
  action 
  the 
  kerosene 
  in 
  

   the 
  mixture 
  was 
  12%. 
  ^Vith 
  an 
  indication 
  of 
  5% 
  of 
  kerosene 
  the 
  actual 
  

   delivery 
  varied 
  from 
  4..o-j'/(: 
  to 
  6.g2<^/c. 
  Additional 
  details 
  of 
  these 
  tests 
  

   are 
  given 
  in 
  the 
  following 
  table: 
  

  

  Test 
  of 
  "Success 
  Kerosene 
  Sprayer." 
  

  

  Actual 
  percentage 
  in 
  spray. 
  

  

  Mixtures 
  of 
  carboleum 
  — 
  an 
  insecticide 
  sent 
  us 
  for 
  experimental 
  use 
  

   by 
  the 
  Prescott 
  CMiemical 
  Company, 
  134 
  Van 
  Buren 
  St., 
  Chicago 
  — 
  were 
  

   too 
  little 
  tried 
  to 
  warrant 
  a 
  final 
  conclusion. 
  One, 
  two, 
  and 
  four 
  per 
  

   cent, 
  solutions 
  were 
  wilhcjut 
  pronounced 
  effect 
  upon 
  the 
  scale 
  and 
  did 
  

   no 
  permanent 
  harm 
  to 
  the 
  trees. 
  This 
  insecticide 
  mixes 
  freely 
  with 
  

   water 
  in 
  all 
  proportions 
  except 
  for 
  a 
  heavy 
  substance 
  which 
  settles 
  to 
  

   the 
  bottom 
  of 
  the 
  mixture 
  as 
  a 
  heavy 
  brown 
  oil. 
  This 
  filters 
  out 
  readily, 
  

   and 
  the 
  remaining 
  licpiid 
  is 
  then 
  a 
  stable 
  emulsion 
  of 
  a 
  light 
  coffee 
  

  

  