﻿348 
  W. 
  F. 
  FISKE. 
  

  

  It 
  was 
  an 
  integral 
  and 
  most 
  important 
  feature 
  of 
  the 
  original 
  plan 
  that, 
  after 
  

   the 
  factors 
  which 
  operate 
  in 
  the 
  " 
  natural 
  control 
  " 
  of 
  the 
  insect 
  should 
  have 
  been 
  

   identified 
  and 
  studied, 
  an 
  experiment 
  should 
  be 
  conducted 
  ona" 
  practical 
  " 
  scale 
  

   to 
  demonstrate 
  at 
  the 
  same 
  time 
  the 
  accuracy 
  and 
  the 
  economic 
  applicability 
  of 
  

   the 
  knowledge 
  acquired. 
  By 
  the 
  spring 
  of 
  1915 
  sufficiently 
  definite 
  conclusions 
  

   had 
  been 
  reached 
  on 
  the 
  particular 
  points 
  at 
  issue 
  to 
  justify 
  this 
  experiment. 
  

   Until 
  then 
  the 
  investigations 
  had 
  been 
  conducted 
  on 
  the 
  islands. 
  The 
  experiment 
  

   could 
  not 
  be 
  made 
  on 
  the 
  islands, 
  but 
  must 
  be 
  made 
  on 
  the 
  mainland. 
  Consultation 
  

   with 
  the 
  Principal 
  Medical 
  Officer 
  as 
  to 
  the 
  best 
  site 
  for 
  it 
  led 
  to 
  the 
  selection 
  of 
  the 
  

   Buddu 
  district, 
  which 
  borders 
  the 
  lake 
  for 
  some 
  ninety 
  miles 
  just 
  north 
  of 
  the 
  old 
  

   German 
  frontier. 
  Therefore 
  a 
  tour 
  was 
  made 
  with 
  the 
  object 
  of 
  surveying 
  this 
  

   reach 
  of 
  shore 
  carefully, 
  to 
  ascertain 
  the 
  degree 
  of 
  infestation 
  by 
  the 
  tsetse 
  ; 
  the 
  

   probable 
  cost 
  of 
  exterminating 
  it 
  ; 
  the 
  precise 
  location 
  of 
  old 
  village 
  sites, 
  canoe 
  

   landings, 
  fishing 
  grounds, 
  etc., 
  with 
  respect 
  to 
  fly; 
  and 
  such 
  other 
  points 
  as 
  required 
  

   consideration 
  preliminary 
  to 
  any 
  experiment 
  of 
  the 
  character 
  proposed. 
  

  

  The 
  results 
  of 
  this 
  survey 
  were 
  unexpected, 
  and 
  led 
  to 
  a 
  complete 
  revolution 
  

   of 
  ideas 
  previously 
  entertained. 
  The 
  reach 
  of 
  shore 
  is 
  naturally 
  divided 
  into 
  a 
  

   considerable 
  number 
  of 
  semi-isolated 
  districts, 
  having 
  from 
  two 
  and 
  a 
  half 
  to 
  

   seventeen 
  miles 
  of 
  frontage 
  on 
  the 
  lake. 
  Some 
  of 
  these 
  districts 
  were 
  found 
  to 
  

   be 
  infested 
  by 
  tsetse 
  to 
  a 
  degree 
  of 
  density 
  never 
  before 
  encountered. 
  Others 
  were 
  

   very 
  lightly 
  infested. 
  In 
  one 
  district 
  a 
  few 
  days 
  labour 
  with 
  a 
  good 
  gang 
  of 
  men 
  

   would 
  have 
  sufficed 
  to 
  exterminate 
  all 
  the 
  fly 
  on 
  a 
  reach 
  of 
  some 
  five 
  miles. 
  In 
  

   this 
  case 
  the 
  natives 
  would 
  very 
  willingly 
  have 
  given 
  the 
  labour 
  in 
  return 
  for 
  the 
  

   lands 
  and 
  the 
  fishing 
  grounds 
  off 
  shore, 
  for 
  the 
  lands 
  were 
  good 
  and 
  extensive 
  and 
  

   the 
  fishing 
  grounds 
  productive. 
  In 
  several 
  other 
  districts 
  it 
  was 
  thought 
  probable 
  

   that 
  the 
  value 
  of 
  the 
  land 
  and 
  water 
  rights 
  was 
  sufficient 
  to 
  induce 
  the 
  natives 
  

   to 
  undertake 
  all 
  the 
  labour 
  requisite 
  to 
  exterminate 
  fly 
  without 
  other 
  expense 
  to 
  

   the 
  Government 
  than 
  that 
  of 
  supervision 
  and 
  inspection. 
  Any 
  of 
  these 
  would, 
  

   have 
  been 
  an 
  excellent 
  site 
  for 
  the 
  proposed 
  experiment. 
  

  

  There 
  was 
  one 
  district, 
  however, 
  Bukakata, 
  which 
  had 
  a 
  frontage 
  of 
  some 
  six- 
  

   and 
  a 
  half 
  miles 
  on 
  the 
  lake 
  and 
  included 
  the 
  steamer 
  landing 
  for 
  Masaka 
  station,, 
  

   that 
  presented 
  a 
  strange 
  problem. 
  The 
  lands 
  adjoining 
  the 
  lake 
  in 
  the 
  depopulated 
  

   or 
  forbidden 
  zone 
  were 
  valueless 
  for 
  agriculture. 
  The 
  fishing 
  rights 
  were 
  valuable,, 
  

   and 
  would 
  have 
  been 
  a 
  considerable 
  inducement 
  to 
  the 
  natives 
  to 
  clear 
  the 
  shore 
  

   of 
  tsetse, 
  except 
  for 
  the 
  fact 
  that 
  the 
  natives 
  were 
  already 
  occupying 
  them, 
  openly,, 
  

   for 
  the 
  entire 
  reach 
  of 
  six 
  miles. 
  Infestation 
  by 
  tsetse 
  was 
  much 
  heavier 
  than 
  in 
  

   certain 
  other 
  districts, 
  but 
  still 
  moderate, 
  exceeding 
  the 
  average 
  for 
  the 
  lake 
  shore 
  

   and 
  islands 
  as 
  a 
  whole 
  at 
  only 
  a 
  few 
  points, 
  and 
  averaging 
  for 
  the 
  district 
  about 
  

   half 
  the 
  average 
  for 
  the 
  region 
  generally. 
  Careful 
  inquiry 
  failed 
  to 
  elicit 
  a 
  particle 
  

   of 
  evidence 
  that 
  any 
  of 
  the 
  native 
  fishermen 
  had 
  suffered 
  in 
  the 
  slightest 
  degree 
  

   from 
  long-continued 
  exposure 
  to 
  tsetse 
  under 
  these 
  conditions. 
  

  

  At 
  certain 
  other 
  points 
  along 
  the 
  shore 
  surveyed 
  poaching 
  was 
  free 
  and 
  flagrant 
  ; 
  

   at 
  one 
  point 
  in 
  particular, 
  where 
  density 
  of 
  fly 
  was 
  more 
  than 
  seven 
  times 
  greater 
  

   than 
  the 
  average 
  for 
  the 
  region 
  generally, 
  and 
  where, 
  in 
  addition 
  to 
  this, 
  food 
  

   (of 
  fly) 
  was 
  very 
  scarce 
  and 
  the 
  flies 
  literally 
  ravenous, 
  twenty- 
  three 
  fish 
  traps, 
  

  

  