﻿244 
  J. 
  Barrell 
  — 
  The 
  Piedmont 
  Terraces 
  

  

  that 
  slopes 
  may 
  or 
  not 
  be 
  truly 
  shown. 
  A 
  rather 
  limited 
  

   experience 
  suggests 
  that 
  there 
  is 
  room 
  to 
  exercise 
  con- 
  

   siderable 
  judgment 
  in 
  the 
  selection 
  of 
  slopes. 
  The 
  case 
  

   may 
  arise, 
  also, 
  where 
  it 
  is 
  advisable 
  to 
  omit 
  a 
  prominent 
  

   object 
  in 
  the 
  foreground 
  because 
  it 
  hides 
  too 
  much 
  of 
  the 
  

   country 
  beyond 
  ; 
  or, 
  if 
  it 
  seems 
  desirable 
  to 
  retain 
  it, 
  the 
  

   topography 
  hidden 
  by 
  it 
  may 
  be 
  indicated 
  by 
  dotted 
  lines. 
  

   In 
  effect 
  a 
  projected 
  profile 
  is 
  a 
  skeletonized 
  block 
  dia- 
  

   gram 
  and 
  consequently 
  calls 
  for 
  the 
  exercise, 
  in 
  some 
  

   degree, 
  of 
  the 
  pictorial 
  sense. 
  — 
  Editoe.] 
  

  

  There 
  are 
  a 
  number 
  of 
  reasons 
  why 
  this 
  system 
  of 
  pro- 
  

   jected 
  profiles 
  is 
  preferred 
  to 
  the 
  more 
  simple 
  profiles 
  

   in 
  common 
  use. 
  Single 
  vertical-plane 
  profiles 
  generally 
  

   are 
  of 
  limited 
  use 
  in 
  demonstrating 
  the 
  former 
  existence 
  

   of 
  a 
  surface 
  now 
  nearly 
  destroyed 
  by 
  erosion. 
  The 
  

   direction 
  of 
  a 
  single 
  vertical 
  section 
  must 
  be 
  specially 
  

   chosen 
  if 
  it 
  is 
  to 
  pass 
  through 
  more 
  than 
  one 
  or 
  two 
  rem- 
  

   nants. 
  The 
  greater 
  part 
  of 
  such 
  a 
  profile 
  will 
  show 
  only 
  

   the 
  surfaces 
  of 
  later 
  erosion 
  and 
  the 
  choosing 
  of 
  the 
  posi- 
  

   tion 
  of 
  the 
  vertical 
  plane 
  is 
  open 
  to 
  the 
  danger 
  of 
  select- 
  

   ing 
  facts 
  which 
  support 
  a 
  favored 
  hypothesis. 
  

  

  Miss 
  Hatch 
  has 
  published 
  profiles 
  of 
  a 
  section 
  of 
  south- 
  

   eastern 
  Connecticut 
  which 
  show 
  excellently 
  the 
  character 
  

   of 
  the 
  upland 
  as 
  a 
  succession 
  of 
  terraces 
  facing 
  the 
  sea 
  

   and 
  stepping 
  down 
  from 
  500 
  feet 
  through 
  400, 
  300, 
  200, 
  

   and 
  100 
  feet. 
  s 
  Projected 
  profiles 
  were 
  constructed 
  of 
  

   the 
  ridges 
  between 
  the 
  principal 
  stream 
  valleys; 
  ^ve 
  

   strips 
  each 
  averaging 
  about 
  two 
  and 
  one-half 
  miles 
  wide 
  

   were 
  used. 
  Where, 
  as 
  in 
  this 
  case, 
  the 
  terraces 
  are 
  fairly 
  

   well 
  preserved 
  such 
  narrow 
  strips 
  will 
  give 
  a 
  satisfactory 
  

   profile. 
  Where 
  no 
  one 
  interfluvial 
  ridge, 
  however, 
  has 
  

   the 
  terrace 
  system 
  well 
  preserved, 
  a 
  projection 
  of 
  sev- 
  

   eral 
  ridges 
  upon 
  the 
  same 
  plane 
  will 
  become 
  necessary 
  in 
  

   order 
  to 
  piece 
  out 
  the 
  evidence. 
  

  

  Lobeck 
  has 
  used 
  a 
  somewhat 
  similar 
  system 
  of 
  projec- 
  

   tion 
  in 
  his 
  study 
  on 
  "The 
  position 
  of 
  the 
  New 
  England 
  

   peneplane 
  in 
  the 
  White 
  Mountain 
  region," 
  9 
  except 
  that 
  

   the 
  foreground 
  is 
  omitted. 
  He 
  divided 
  a 
  belt 
  of 
  country 
  

   fifteen 
  miles 
  wide 
  into 
  five 
  strips 
  and 
  projected 
  each 
  

   separately, 
  each 
  profile 
  showing 
  only 
  the 
  sky-line 
  for 
  a 
  

   belt 
  three 
  miles 
  wide. 
  Putting 
  in 
  the 
  foreground, 
  how- 
  

   ever, 
  has 
  a 
  certain 
  advantage 
  in 
  construction, 
  even 
  if 
  

  

  8 
  Laura 
  Hatch 
  : 
  Marine 
  terraces 
  in 
  southeastern 
  Connecticut, 
  this 
  Journal, 
  

   44, 
  319-330, 
  1917. 
  

  

  9 
  The 
  Geogr. 
  Eeview, 
  vol. 
  3, 
  pp. 
  53-60, 
  1917. 
  

  

  