﻿Ill] 
  Special 
  Report 
  No. 
  7 
  : 
  Meridian 
  Lines 
  323 
  

  

  such 
  readings 
  are 
  scarcely 
  worthy 
  of 
  publication, 
  and 
  for 
  the 
  

   following 
  reasons 
  : 
  The 
  results 
  though 
  correct 
  would 
  not 
  be 
  

   directly 
  serviceable 
  to 
  local 
  surveyors 
  using 
  their 
  own 
  instru- 
  

   ments, 
  and, 
  to 
  be 
  of 
  service 
  in 
  purely 
  scientific, 
  work, 
  the 
  amount 
  

   of 
  declination 
  should 
  be 
  determined 
  by 
  a 
  magnetometer 
  specially 
  

   constructed 
  for 
  such 
  work. 
  And 
  again, 
  the 
  dip 
  and 
  intensity 
  or 
  

   total 
  magnetic 
  force 
  should 
  be 
  determined 
  in 
  order 
  to 
  advance 
  

   the 
  cause 
  of 
  the 
  science 
  of 
  terrestial 
  magnetism. 
  

  

  A 
  fine 
  field 
  for 
  magnetic 
  work. 
  — 
  The 
  complicated 
  geologic 
  

   structure 
  of 
  lyouisiana 
  is 
  just 
  beginning 
  to 
  be 
  realized. 
  Gener- 
  

   alities 
  based 
  on 
  trans-Mississippi 
  investigations, 
  and 
  smooth, 
  

   straight 
  lines 
  separating 
  the 
  different 
  series 
  and 
  stages 
  will 
  soon 
  

   be 
  relegated 
  to 
  the 
  past. 
  It 
  is 
  mainly 
  through 
  invertebrate 
  pale- 
  

   ontology 
  that 
  the 
  relationships 
  of 
  the 
  various 
  formations 
  repres- 
  

   ented 
  in 
  the 
  State 
  are 
  and 
  have 
  been 
  determined. 
  Yet 
  if 
  we 
  

   mistake 
  not, 
  paleobotany 
  will 
  soon 
  be 
  able 
  to 
  lend 
  a 
  hand 
  in 
  this 
  

   work. 
  Possibly 
  too 
  magnetic 
  investigations 
  may 
  throw 
  some 
  

   light 
  on 
  stratigraphy. 
  Be 
  that 
  as 
  it 
  may, 
  it 
  is 
  certain 
  that 
  the 
  

   smooth 
  agonic 
  lines 
  heretofore 
  drawn 
  through 
  Louisiana 
  will 
  be 
  

   crumpled 
  and 
  curved 
  in 
  a 
  marked 
  fashion 
  when 
  they 
  have 
  been 
  

   platted 
  from 
  a 
  large 
  number 
  of 
  field 
  observations. 
  

  

  Witness 
  : 
  At 
  Many 
  decl. 
  about 
  7° 
  ; 
  Natchitoches, 
  6° 
  40' 
  ; 
  St. 
  

   Maurice, 
  6° 
  35' 
  ; 
  Couley, 
  6° 
  40' 
  ; 
  Winnfield, 
  6° 
  45° 
  ; 
  Columbia, 
  

   6° 
  10'. 
  January 
  and 
  February, 
  1899. 
  

  

  Have 
  the 
  results 
  of 
  orographic 
  movements 
  so 
  manifest 
  about 
  

   Winnfield 
  anything 
  to 
  do 
  with 
  the 
  irregular 
  declination 
  there 
  

   shown 
  ? 
  

  

  In 
  Louisiana, 
  as 
  well 
  as 
  other 
  States 
  laid 
  out 
  in 
  rectangular 
  

   townships, 
  sections, 
  etc., 
  the 
  question 
  of 
  latitude, 
  so 
  essential 
  in 
  

   rapid 
  and 
  accurate 
  magnetic 
  survey 
  work 
  is 
  often 
  quickly 
  deter- 
  

   mined 
  with 
  suflScient 
  accuracy 
  by 
  asking 
  any 
  resident 
  what 
  sec- 
  

   tion 
  he 
  is 
  in, 
  or 
  by 
  inspecting 
  his 
  deeds 
  or 
  tax 
  receipts, 
  and 
  

   having 
  him 
  point 
  out 
  the 
  locations 
  of 
  the 
  various 
  "quarter 
  

   quarters" 
  called 
  for. 
  Yet 
  there 
  are 
  places 
  occasionally 
  where 
  

   there 
  are 
  no 
  inhabitants 
  for 
  15 
  or 
  20 
  miles 
  along 
  the 
  main 
  roads. 
  

  

  