﻿IM'KOIH 
  ("1'ION 
  TO 
  J50TAXY 
  

  

  for 
  them 
  were 
  attacked 
  by 
  these 
  preventable 
  diseases, 
  the 
  

   matter 
  would 
  not 
  be 
  so 
  serious, 
  for 
  in 
  that 
  case 
  disease 
  and 
  

   tin- 
  resulting 
  deaths 
  would 
  tend 
  to 
  eliminate 
  those 
  who 
  do 
  not 
  

   act 
  upon 
  the 
  knowledge 
  of 
  sanitation 
  which 
  we 
  now 
  possess; 
  

   but 
  niiiiiy 
  innocent 
  people 
  suffer 
  because 
  others 
  do 
  not 
  take 
  

   proper 
  precautions 
  against 
  the 
  spread 
  of 
  diseases 
  over 
  which 
  

   they 
  might 
  have 
  control. 
  As 
  one 
  means 
  of 
  protecting 
  the 
  

   public 
  many 
  slates 
  have 
  laws 
  preventing 
  the 
  use 
  of 
  public 
  

   drinking 
  cups. 
  Attempts 
  are 
  made 
  to 
  have 
  school 
  children 
  

   drink 
  from 
  running 
  water, 
  so 
  as 
  to 
  make 
  sure 
  that 
  all 
  con- 
  

   taminated 
  water 
  Hows 
  away. 
  We 
  need 
  many 
  more 
  regulations 
  

   of 
  the 
  same 
  kind 
  in 
  order 
  to 
  guarantee 
  a 
  reasonable 
  security 
  

   against 
  the 
  needless 
  spread 
  of 
  disease. 
  

  

  PROBLEMS 
  

  

  1. 
  How 
  can 
  you 
  show 
  that 
  the 
  process 
  of 
  decay 
  is 
  of 
  advantage 
  to 
  

   living 
  tilings? 
  \Voiild 
  decay 
  take 
  place 
  without 
  the 
  action 
  of 
  dependent 
  

  

  organisms 
  ? 
  

  

  2. 
  What 
  arc 
  the 
  relative 
  advantages 
  and 
  disadvantages 
  of 
  prevent- 
  

   ing 
  the 
  decay 
  of 
  food 
  l>y 
  refrigeration 
  and 
  by 
  the 
  use 
  of 
  chemicals? 
  

   Why 
  are 
  chemicals 
  sometimes 
  used 
  where 
  other 
  means 
  of 
  preservation 
  

   mi-ht 
  he 
  adopted? 
  

  

  3. 
  What 
  are 
  the 
  surest 
  methods 
  of 
  preventing 
  the 
  spread 
  of 
  bacterial 
  

  

  diseases 
  of 
  plant*, 
  such 
  as 
  pear 
  blight 
  and 
  the 
  black 
  rot 
  of 
  cabbage? 
  

  

  4. 
  Would 
  the 
  tight, 
  against, 
  typhoid 
  fever 
  be 
  won 
  more 
  quickly 
  by 
  

   destroying 
  all 
  flies 
  that 
  carry 
  typhoid 
  or 
  by 
  destroying 
  all 
  infecting 
  

   material 
  from 
  persons 
  who 
  have 
  typhoid'.'' 
  

  

  5. 
  In 
  your 
  school 
  anil 
  community 
  what 
  are 
  the 
  chief 
  needs 
  for 
  a 
  

   better 
  understanding 
  of 
  the 
  nature 
  of 
  bacterial 
  diseases 
  ? 
  

  

  6. 
  What 
  are 
  your 
  local 
  regulations 
  in 
  regard 
  to 
  quarantining 
  persons 
  

  

  ill 
  with 
  infectious 
  diseases? 
  in 
  regard 
  to 
  preventing 
  the 
  introduction 
  of 
  

   diseased 
  fruit 
  trees? 
  of 
  diseased 
  animals? 
  

  

  7. 
  What 
  bulletins 
  has 
  your 
  stale 
  agricultural 
  experiment 
  stationer 
  

   your 
  state 
  board 
  of 
  health 
  published 
  dealing 
  with 
  the 
  relation 
  of 
  bac- 
  

   teria 
  to 
  human 
  disease, 
  diseases 
  of 
  farm 
  animals, 
  dairying, 
  household 
  

   industries, 
  or 
  agriculture? 
  

  

  