﻿148 
  Gkological 
  Survey 
  of 
  Louisiana 
  [Sect. 
  

  

  Iron 
  spriiigs. 
  — 
  For 
  location, 
  see 
  map, 
  two 
  thirds 
  way 
  from 
  

   Natchitoches 
  to 
  Camp 
  Salubrity. 
  About 
  five 
  different 
  sources 
  

   of 
  water 
  are 
  here 
  found 
  in 
  a 
  few 
  yards 
  square. 
  The 
  waters 
  of 
  

   each 
  rise 
  in 
  sunken 
  barrels 
  or 
  sections 
  of 
  large 
  tile. 
  They 
  pro- 
  

   ceed 
  from 
  light 
  Ivignitic 
  sand 
  beds, 
  and 
  issue 
  at 
  a 
  level 
  of 
  per- 
  

   haps 
  25 
  feet 
  above 
  that 
  of 
  "Lac 
  a 
  Poisson." 
  Their 
  waters 
  

   are 
  chalybeate. 
  

  

  These 
  springs 
  are 
  pleasantly 
  located 
  in 
  a 
  little 
  ravine 
  in 
  the 
  

   woods. 
  Pine, 
  oak 
  (red, 
  white), 
  beech, 
  black 
  gum 
  and 
  maple 
  

   are 
  the 
  commoner 
  trees. 
  

  

  Chemical 
  Analysis 
  by 
  Mattrice 
  Bird, 
  B.S. 
  

  

  (Parts 
  per 
  100,000 
  of 
  water) 
  

  

  " 
  Silica 
  6.4 
  

  

  Iron 
  and 
  aluminum 
  oxides 
  8 
  

  

  Lime 
  (CaO) 
  1.2 
  

  

  Magnesia 
  ... 
  .93 
  

  

  Sulphuric 
  acid 
  ( 
  So3) 
  2.26 
  

  

  Potash 
  6 
  

  

  Soda 
  3.0 
  

  

  Chlorine 
  1.9" 
  

  

  "Water 
  is 
  colorless, 
  but 
  contains 
  a 
  little 
  brown 
  suspended 
  matter 
  ; 
  it 
  is 
  

   neutral 
  to 
  litmus 
  paper 
  and 
  practically 
  tasteless." 
  

  

  Breazeale 
  spring. 
  — 
  This 
  spring 
  is 
  still 
  farther 
  towards 
  Camp 
  

   Salubrity. 
  

  

  It 
  is 
  situated 
  in 
  a 
  steep 
  ravine 
  85 
  feet 
  below 
  the 
  Breazeale 
  

   summer 
  house. 
  It 
  is 
  large, 
  stoned 
  up 
  with 
  lignitic 
  ferru- 
  

   ginous 
  sandstone. 
  

  

  Analysis 
  according 
  to 
  Mr. 
  Bird 
  

  

  (Parts 
  per 
  100,000 
  of 
  water) 
  

  

  " 
  Silica 
  5.5 
  

  

  Iron 
  and 
  aluminum 
  oxides 
  4 
  

  

  Lime 
  (CaO) 
  9 
  

  

  Magnesia 
  57 
  

  

  Sulphuric 
  acid 
  ( 
  So^) 
  2.06 
  

  

  Potash 
  4 
  

  

  Soda 
  2.2 
  

  

  Chlorine 
  1.74 
  " 
  

  

  "Water 
  is 
  clear 
  and 
  colorless, 
  neutral 
  to 
  litmus 
  paper 
  and 
  practically 
  

   tasteless."* 
  

  

  *The 
  Survey 
  is 
  under 
  obligations 
  to 
  Prof. 
  U. 
  P. 
  Breazeale 
  of 
  Natchi- 
  

   toches 
  for 
  obtaining 
  and 
  transmitting 
  these 
  waters 
  to 
  the 
  Experiment 
  

   Station 
  at 
  Calhoun. 
  

  

  