﻿158 
  Bucher 
  — 
  Origin 
  of 
  Ripples, 
  and 
  

  

  Table 
  III. 
  — 
  Observational 
  Data 
  on 
  Subaqueous 
  Current-Ripples.* 
  

  

  Author 
  

  

  Locality. 
  

  

  1 
  

  

  cm. 
  

  

  a 
  

   cm. 
  

  

  I 
  

   a 
  

  

  horizontal 
  

  

  form 
  

  

  index. 
  

  

  D 
  

   mm. 
  

  

  d 
  

   m. 
  

  

  V 
  

  

  m./sec. 
  

  

  t 
  

   mm./sec. 
  

  

  Bucher 
  

  

  bank 
  of 
  creek, 
  

   after 
  flood. 
  

  

  St. 
  Lawrence 
  

  

  River 
  

  

  it 
  a 
  

  

  in 
  gutter 
  after 
  

   heavy 
  rain 
  _ 
  

  

  sea 
  shore 
  

   (undertow 
  of 
  

   wave) 
  

  

  1-1-2-0 
  

  

  3-8 
  

   5-0 
  

  

  o-i 
  

  

  10 
  

  

  1-8 
  

  

  av. 
  0-5 
  

   max. 
  2*5 
  

  

  few 
  cm. 
  

  

  

  

  

  

  

  *Kindle, 
  

   1917 
  

  

  0-076 
  

   0-15 
  

  

  barely 
  

   percep- 
  

   " 
  tible 
  

  

  0'03 
  a 
  

  

  (p. 
  13).... 
  

   (p. 
  12)... 
  

  

  

  

  

  

  0-04 
  

  

  

  4-6 
  

   19 
  d 
  

  

  20 
  

   4-6 
  

  

  

  

  

  Bucher 
  

  

  5-7 
  

   60 
  

  

  0-3 
  

   0-3 
  

  

  

  fine 
  sand 
  

   with 
  

   mud 
  

  

  

  

  Hahmann, 
  

   1912 
  

  

  

  

  

  Berthololy, 
  

   1900 
  (p. 
  31) 
  

  

  

  

  

  

  

  (p. 
  91) 
  

  

  creek 
  

  

  

  0-5-1-5 
  

   2-5 
  

  

  

  sand 
  

  

  coarser 
  

  

  material 
  

  

  

  

  

  

  << 
  

  

  

  

  

  

  

  

  

  lake 
  shore 
  

   (wave 
  of 
  

   translation). 
  

  

  sea 
  shore 
  

  

  creek 
  

  

  Avon 
  river, 
  

  

  N.S 
  

  

  tidal 
  flats, 
  N. 
  

  

  S. 
  

  

  (< 
  a 
  

  

  sea 
  shore, 
  

   Labrador... 
  

  

  Rhine 
  river. 
  . 
  

  

  9ea 
  -hore, 
  

   England 
  ... 
  

  

  7-6 
  

  

  8-9 
  

   10-2 
  

  

  9-1 
  

  

  8-2, 
  8-9 
  

   13-4, 
  14-9 
  

  

  7-6-10-2 
  

  

  15 
  

  

  30 
  

  

  

  

  

  *Wyman, 
  

   1866 
  

  

  

  

  0-04 
  

  

  *Sorby, 
  

   1908 
  

  

  1-8 
  

   0-9 
  

  

  0-7 
  

  

  6-7-0-7 
  

   1-6-1-4 
  

  

  1-9 
  

  

  1-0 
  

  

  5 
  

  

  11 
  

  

  13 
  

  

  12 
  

   8,10 
  

  

  4-5 
  

  

  15 
  

  

  (l'8) 
  b 
  

   (4-7) 
  b 
  

  

  3-8 
  

  

  2-3, 
  1-8 
  

   1-8, 
  2-6 
  

  

  

  

  

  

  

  

  

  0-305 
  (s) 
  

  

  1-3 
  

  

  •Kindle, 
  

   1917 
  

  

  fig. 
  3, 
  opp. 
  

   P- 
  8 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  *Brown, 
  

   1902 
  

  

  

  

  

  

  Hahmann, 
  

   1912 
  

  

  

  

  

  

  

  •Sorby, 
  

   L908 
  

  

  

  

  

  

  

  _ 
  

  

  

  

  

  

  

  * 
  ' 
  J 
  taken 
  from 
  authors 
  marked 
  with 
  an 
  asterisk 
  have 
  been 
  transformed 
  from 
  inches 
  

   '" 
  ,1 
  " 
  nearest 
  mm. 
  The 
  symbols 
  at 
  the 
  heads 
  of 
  the 
  columns 
  the 
  same 
  as 
  those 
  used 
  on 
  Table 
  

  

  • 
  oscillation 
  ripples 
  formed 
  by 
  "onshore 
  waves 
  working 
  in 
  the 
  presence 
  of 
  a 
  

   barely 
  peroeptible 
  current." 
  

   b 
  Computed 
  from 
  the 
  angles 
  of 
  slope 
  given 
  (9°, 
  19°; 
  18°, 
  30°). 
  

  

  • 
  A.ugUT 
  lake 
  near 
  Keeseville, 
  Clinton 
  Co., 
  New 
  York, 
  which 
  is 
  about 
  one 
  and 
  one-fifth 
  mile 
  

   long 
  and 
  one 
  to 
  two 
  filths 
  of 
  ;i 
  mile 
  wide. 
  The 
  steep 
  side 
  of 
  the 
  ripples 
  faced 
  the 
  land 
  ; 
  they 
  

  

  idnced 
  by 
  the 
  waves 
  of 
  translation 
  resulting 
  from 
  waves 
  90 
  cm. 
  long. 
  

   d 
  Tins 
  abnormal 
  ratio 
  was 
  duo 
  to 
  lack 
  of 
  sediment, 
  for 
  on 
  the 
  lee-side 
  of 
  each 
  ripple 
  the 
  con- 
  

   bottom 
  of 
  the 
  -utter 
  was 
  exposed 
  for 
  the 
  distance 
  of 
  about 
  1-5 
  cm. 
  

  

  