﻿Map 
  showing 
  Distribution 
  and 
  Result 
  of 
  Chinch-bug 
  Infection 
  Experiments 
  in 
  Kansas 
  in 
  1891. 
  

  

  • 
  Red 
  circles 
  indicate 
  successfni 
  experiments 
  

   - 
  Orange 
  squares 
  Indicate 
  onsnccesstol 
  experiments 
  

   x 
  Blue 
  crosses 
  Indicate 
  doubtful 
  experiments 
  

  

  '•'•«*/, 
  iSii. 
  by 
  T%t 
  Afallkemi-.V 
  

  

  