﻿Plate 
  \Tn 
  

  

  HrfKf7in,- 
  (i,fiooft. 
  Fit^.J, 
  Sec6ion 
  acj^oss 
  JVor^thern 
  Grotcjo. 
  

  

  7 
  Tniles. 
  

  

  JEtrst. 
  ^ 
  

  

  /Jits'- 
  /f/ff 
  O'HOOft 
  

  

  F'igr- 
  2. 
  Section 
  across 
  Micldle 
  Groujo. 
  

   7 
  f/iiles 
  . 
  

  

  [. 
  

  

  

  Has, 
  lino 
  Gfioort 
  JF'ig^. 
  3. 
  Sectio?t 
  cfci^oss 
  Soictkern 
  Groujo. 
  ^'='*''- 
  

  

  7jniles. 
  

  

  Du/ioia 
  Cfefacpoifs, 
  Vi'^^^A 
  •Juftr 
  Triers, 
  

  

  JL-Jj 
  J^ce^eozoip. 
  

  

  Tr'aohyte 
  . 
  

  

  S^et-tions 
  ctc^o^s 
  the 
  SIJSIi/L^. 
  LA 
  SAL. 
  

   /o/^ 
  fines 
  see 
  map 
  on 
  Plate 
  V. 
  

  

  HM. 
  PHOTO-LITHO. 
  CO. 
  N.Y. 
  i 
  OSBORNE'S 
  PBOCI 
  

  

  