﻿General 
  Considerations 
  

   The 
  Origin 
  of 
  the 
  Islands 
  

   The 
  method 
  and 
  date 
  of 
  Comparison 
  of 
  the 
  Louisiana 
  

  

  formation 
  259 
  rock 
  salt 
  deposits 
  to 
  the 
  great 
  

  

  deposits 
  of 
  the 
  world 
  261 
  

  

  