﻿F. 
  B. 
  Taylor 
  — 
  Niagara 
  and 
  the 
  Great 
  Lakes. 
  263 
  

  

  beacli 
  is 
  25 
  feet 
  above 
  the 
  lake, 
  and 
  the 
  Algonquin 
  100 
  feet. 
  

   From 
  these 
  data 
  it 
  appears 
  that 
  in 
  120 
  miles 
  from 
  west 
  to 
  east 
  

   the 
  Nipissing 
  beach 
  rises 
  25 
  feet 
  and 
  the 
  Algonquin 
  beach 
  40 
  

   feet, 
  or 
  at 
  rates 
  of 
  two 
  inches 
  and 
  three 
  and 
  one-half 
  inches 
  per 
  

   mile 
  respectively. 
  On 
  the 
  east 
  side 
  the 
  Algonquin 
  plane 
  pro- 
  

   jected 
  southward, 
  passes 
  under 
  the 
  lake 
  in 
  the 
  vicinity 
  of 
  

   Ludington 
  or 
  Pentwater. 
  On 
  the 
  west 
  side 
  the 
  plane 
  carried 
  

   from 
  Two 
  Rivers 
  to 
  Chicago 
  150 
  miles 
  south 
  strikes 
  more 
  

   than 
  100 
  feet 
  below 
  the 
  lake. 
  

  

  Mr. 
  Upham 
  supposes 
  his 
  glacial 
  Lake 
  Warren 
  to 
  have 
  had 
  

   its 
  outlet 
  at 
  Chicago, 
  and 
  he 
  refers 
  to 
  my 
  third 
  paper 
  to 
  show 
  

   that 
  the 
  highest 
  beach 
  of 
  the 
  Green 
  Bay 
  region 
  continues 
  

   southward 
  about 
  at 
  present 
  lake 
  level. 
  He 
  may 
  have 
  been 
  

   misled 
  by 
  a 
  misprint 
  in 
  the 
  table 
  of 
  altitudes 
  in 
  that 
  paper.* 
  

   But 
  I 
  state 
  distinctly 
  in 
  the 
  concluding 
  paragraph 
  of 
  the 
  

   article 
  that 
  the 
  beach 
  passes 
  under 
  the 
  lake 
  southward 
  from 
  

   Two 
  Rivers. 
  If 
  he 
  accepts 
  the 
  present 
  facts 
  without 
  offering 
  

   others 
  to 
  controvert 
  the 
  conclusions 
  which 
  they 
  plainly 
  indi- 
  

   cate, 
  Mr. 
  Upham 
  will 
  have 
  to 
  grant 
  that 
  neither 
  the 
  waters 
  

   which 
  made 
  the 
  Algonquin 
  beach 
  nor 
  those 
  which 
  made 
  the 
  

   Chippewa 
  beach 
  had 
  an 
  outlet 
  at 
  Chicago. 
  There 
  are 
  beaches 
  

   converging 
  to 
  the 
  Chicago 
  outlet, 
  as 
  is 
  well 
  proved 
  by 
  the 
  

   observations 
  of 
  Andrews, 
  Bannister 
  and 
  Leverett. 
  But 
  they 
  

   do 
  not 
  extend 
  far 
  north, 
  and 
  all 
  are 
  in 
  planes 
  which 
  lie 
  above 
  

   the 
  Algonquin, 
  Chippewa 
  and 
  Mpissing 
  planes. 
  These 
  latter 
  

   planes 
  all 
  pass 
  down 
  under 
  the 
  lake 
  long 
  before 
  they 
  reach 
  

   Chicago. 
  The 
  Algonquin 
  reaches 
  farthest 
  south 
  above 
  lake 
  

   level, 
  and 
  its 
  plane 
  produced 
  strikes 
  higher 
  at 
  the 
  south 
  end 
  of 
  

   the 
  lake 
  than 
  either 
  of 
  the 
  others. 
  

  

  It 
  is 
  interesting 
  to 
  note 
  the 
  relation 
  of 
  this 
  part 
  of 
  the 
  

   Algonquin 
  plane 
  to 
  the 
  two 
  outlets 
  which 
  served 
  the 
  second 
  

   lake 
  Algonquin. 
  From 
  Petoskey 
  to 
  Port 
  Huron 
  is 
  about 
  175 
  

   miles 
  south 
  and 
  125 
  miles 
  east, 
  and 
  the 
  plane 
  projected 
  from 
  

   Lake 
  Michigan 
  passes 
  40 
  feet 
  above 
  the 
  calculated 
  place 
  of 
  

   Algonquin 
  beach 
  off 
  Sarnia. 
  From 
  Petoskey, 
  North 
  Bay 
  is 
  

   about 
  260 
  miles 
  east 
  and 
  60 
  miles 
  north, 
  and 
  the 
  plane 
  pro- 
  

   duced 
  passes 
  210 
  feet 
  above 
  Georgian 
  Bay, 
  or 
  about 
  50 
  feet 
  

   above 
  the 
  Ni 
  pissing 
  beach 
  at 
  the 
  old 
  outlet 
  at 
  North 
  Bay. 
  

   Subtracting 
  40 
  feet 
  for 
  post-Nipissing 
  local 
  elevation 
  from 
  

   the 
  altitude 
  of 
  the 
  pass 
  at 
  North 
  Bay, 
  the 
  Algonquin 
  plane 
  

   produced 
  strikes 
  90 
  feet 
  above 
  the 
  outlet. 
  Considering 
  the 
  

   fact 
  that 
  the 
  Algonquin 
  beach 
  is 
  the 
  oldest 
  of 
  the 
  three 
  it 
  is 
  

   not 
  surprising 
  that 
  its 
  plane 
  produced 
  from 
  so 
  great 
  a 
  distance 
  

   comes 
  no 
  nearer 
  to 
  these 
  outlets. 
  

  

  * 
  Third 
  paper, 
  second 
  line 
  in 
  table 
  on 
  page 
  325, 
  the 
  altitude 
  of 
  the 
  " 
  Beach 
  

   southward 
  from 
  Two 
  Rivers, 
  Wis.," 
  was 
  intended 
  to 
  read 
  " 
  — 
  582" 
  f3et, 
  not 
  

   " 
  582 
  ; 
  ' 
  feet. 
  

  

  