﻿14 
  Geological 
  Survey 
  of 
  Louisiana 
  [Sect. 
  

  

  as 
  about 
  two 
  hundred 
  and 
  forty 
  barrels 
  of 
  salt 
  per 
  month.* 
  On 
  

   page 
  1 
  86 
  the 
  cause 
  of 
  the 
  rapids 
  at 
  the 
  site 
  of 
  Alexandria 
  is 
  

   ascribed 
  to 
  "two 
  ledges 
  of 
  hard 
  indurated 
  clay, 
  or 
  soft 
  rock 
  

   which 
  extend 
  across 
  the 
  channel 
  at 
  about 
  three-fourths 
  of 
  a 
  mile 
  

   from 
  each 
  other." 
  

  

  Lignite 
  also 
  receives 
  notice 
  in 
  this 
  work. 
  He 
  says 
  : 
  "Stone 
  or 
  

   pit-coal 
  is 
  an 
  article 
  of 
  some 
  importance 
  It 
  fre- 
  

   quently 
  makes 
  its 
  appearance 
  on 
  the 
  Washita, 
  the 
  Sabine, 
  and 
  

   the 
  Red 
  river, 
  particularly 
  on 
  the 
  borders 
  of 
  a 
  lake 
  in 
  the 
  neigh- 
  

   borhood 
  of 
  Nachitoches. 
  This 
  article 
  is 
  of 
  use 
  to 
  smiths, 
  even 
  

   at 
  this 
  time, 
  and 
  its 
  importance 
  will 
  increase 
  as 
  the 
  country 
  

   becomes 
  more 
  populous 
  and 
  the 
  villages 
  enlarge, 
  "f 
  

  

  Dardy.X% 
  — 
  Though 
  Darby's 
  works 
  were 
  of 
  a 
  general 
  nature 
  as 
  

   the 
  titles 
  indicate 
  he 
  wove 
  in 
  many 
  geological 
  facts 
  and 
  observa- 
  

   tions 
  quite 
  in 
  advance 
  of 
  anything 
  that 
  had 
  preceded 
  his 
  works 
  

   and 
  in 
  fact 
  by 
  no 
  means 
  equalled 
  by 
  many 
  of 
  his 
  successors. 
  

  

  He 
  calls 
  attention 
  to 
  the 
  salt 
  deposits 
  on 
  the 
  Saline 
  (Drake's) 
  

   (see 
  Geog. 
  La. 
  pp. 
  29 
  and 
  211 
  and 
  Emigrant's 
  p. 
  89) 
  on 
  the 
  

   land 
  of 
  Mr. 
  Postlethwait. 
  

  

  He 
  describes 
  the 
  occurrence 
  of 
  dead 
  cypress 
  trees 
  in 
  Lake 
  

  

  *Ibid. 
  p. 
  400. 
  

  

  flbid. 
  pp. 
  391-392- 
  

  

  I 
  A 
  Geographical 
  Description 
  of 
  the 
  State 
  of 
  Louisiana 
  : 
  presenting 
  a 
  view 
  

   of 
  the 
  Soil, 
  Climate, 
  Animal, 
  Vegetable 
  and 
  Mineral 
  Productions, 
  Illustra- 
  

   tive 
  of 
  its 
  Natural 
  Physiognomy, 
  its 
  Geographical 
  Configuration, 
  and 
  Rela- 
  

   tive 
  Situation 
  : 
  with 
  an 
  account 
  of 
  the 
  Character 
  and 
  Manners 
  of 
  the 
  

   Inhabitants. 
  Being 
  an 
  Accompaniment 
  to 
  the 
  Map 
  of 
  Louisiana. 
  By 
  

   William 
  Darby. 
  Phila., 
  i8i6. 
  

  

  §The 
  Emigrant's 
  Guide 
  to 
  the 
  Western 
  and 
  Southwestern 
  States 
  and 
  

   Territories 
  ; 
  comprising 
  a 
  Geographical 
  and 
  Statistical 
  Description 
  of 
  the 
  

   States 
  of 
  Louisiana, 
  Mississippi, 
  Tennessee, 
  Kentucky, 
  and 
  Ohio 
  ; 
  the 
  

   Territories 
  of 
  Alabama, 
  Missouri, 
  Illinois, 
  and 
  Michigan 
  ; 
  and 
  the 
  western 
  

   parts 
  of 
  Virginia, 
  Pennsylvania 
  and 
  New 
  York. 
  With 
  a 
  complete 
  List 
  of 
  

   the 
  Road 
  and 
  River 
  Routes 
  west 
  of 
  the 
  Alleghany 
  Mountains, 
  and 
  the 
  con- 
  

   necting 
  roads 
  from 
  New 
  York, 
  Philadelphia, 
  and 
  Washington 
  City 
  to 
  New 
  

   Orleans, 
  St. 
  Louis 
  and 
  Pittsburg. 
  The 
  whole 
  comprising 
  a 
  more 
  compre- 
  

   hensive 
  Account 
  of 
  the 
  Soil, 
  Productions, 
  Climate, 
  and 
  present 
  state 
  of 
  

   Improvement 
  of 
  the 
  Regions 
  described, 
  than 
  any 
  Work 
  hitherto 
  published. 
  

   Accompanied 
  by 
  a 
  map 
  of 
  the 
  United 
  States, 
  including 
  Louisiana. 
  Pro- 
  

   jected 
  and 
  Engraved 
  expressly 
  for 
  this 
  work. 
  By 
  William 
  Darby, 
  New 
  

   York, 
  1818. 
  

  

  