﻿Related 
  Sedimentary 
  Surface 
  Forms. 
  

  

  187 
  

  

  Table 
  V. 
  — 
  Experimental 
  and 
  Observational 
  Data 
  on 
  Oscillation 
  Ripples. 
  

  

  Author. 
  

  

  1* 
  

   cm. 
  

  

  a 
  

   cm. 
  

  

  I 
  

   a 
  

  

  D 
  

  

  mm. 
  

  

  d 
  

   m 
  

  

  m. 
  

  

  a 
  

   m 
  

  

  a 
  

  

  r 
  

   sec. 
  

  

  c 
  

   m./sec. 
  

  

  V 
  

  

  m./sec. 
  

  

  Experimental 
  Data. 
  

   DeCandolle, 
  1883 
  

  

  0-8 
  

  

  2-2-2-8 
  

  

  3-9 
  

  

  5-1 
  

  

  7-6 
  

   l-4 
  b 
  

  

  1-7 
  

   1-75 
  

   2-1 
  

   2-4 
  

  

  0-6 
  

   3-3 
  

  

  3-5 
  

  

  5-8 
  

   6-2 
  

   7-9 
  

  

  5-0 
  

  

  4-5 
  

  

  5-0 
  

  

  6 
  

  

  6 
  

  

  10 
  

  

  3-5-4-5 
  

   5-6 
  

  

  20-30 
  

  

  33 
  

  

  2-40 
  

  

  30-50 
  

  

  

  

  "dust" 
  

  

  sand, 
  

  

  very 
  fine 
  

  

  medium 
  

  

  very 
  

  

  coarse 
  

  

  k 
  

  

  k 
  

   k 
  

   k 
  

   k 
  

  

  fine 
  silt 
  

  

  medium 
  

   sand 
  

  

  0035 
  

   0-05 
  

   k 
  c 
  

  

  k 
  

  

  k 
  

   k 
  

  

  k 
  

   k 
  

   k 
  

   k 
  

  

  0-012- 
  

   0-025 
  

  

  o-i- 
  

  

  0-3 
  

  

  1-83 
  

  

  0-13 
  

   0-075 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  (0-2)* 
  

  

  Forel, 
  1895 
  

  

  k 
  

   k 
  

   k 
  

  

  

  

  k 
  

   k 
  

   k 
  

  

  

  

  

  

  .... 
  

  

  

  

  

  

  

  

  

  

  *Darwin, 
  1883 
  

  

  

  

  

  

  

  0-06- 
  

  

  

  

  

  

  

  

  

  

  

  

  0-14 
  

  

  0-16° 
  

  

  

  

  

  

  

  

  0-19 
  

  

  

  

  

  

  

  

  

  

  25 
  

  

  

  

  

  

  

  

  

  

  0-33 
  

  

  Observational 
  Data. 
  

  

  *Udden, 
  1916, 
  in 
  

  

  small 
  hollow 
  in 
  

  

  o-i 
  

  

  0-5 
  

  

  0-4 
  

  

  0-7 
  

   1-2 
  

   1-4 
  

  

  0-9 
  

  

  0-6 
  

  

  0-9 
  

  

  1 
  

  

  6 
  

   6 
  

  

  9 
  

   8 
  

   5 
  

   6 
  

  

  5-5 
  

  

  8 
  

   5-5 
  

  

  6 
  

  

  

  

  

  

  

  

  rock 
  _ 
  

  

  

  

  

  

  

  

  *Kindle, 
  1917; 
  lake 
  

   bottom 
  (Fig. 
  4).. 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  St. 
  Lawrenc 
  e 
  

   river 
  

  

  

  

  

  

  

  

  Bucher; 
  small 
  pond 
  

   in 
  Park 
  . 
  

  

  

  

  

  

  

  

  *Cornish, 
  1901; 
  sea 
  

   shore, 
  England.. 
  

  

  

  

  

  

  

  

  Forel, 
  1895; 
  Lake 
  

   Geneva 
  

  

  

  

  

  

  

  

  

  

  Stuchlik, 
  1906; 
  lake 
  

  

  bottom 
  _ 
  . 
  

  

  same 
  locality 
  

  

  Hahmann, 
  1912; 
  

   banks 
  of 
  Rhine 
  

   after 
  flood 
  

  

  

  0-3 
  

   after 
  

  

  1-8 
  

   strong 
  

  

  0-12 
  

   storm 
  

  

  15 
  

  

  1-5 
  

  

  1-2 
  

  

  

  

  

  sandy 
  

   mud 
  

   sand 
  

  

  

  

  

  

  sea 
  shore 
  (North) 
  

  

  4-5 
  

  

  flat 
  

  

  7 
  

  

  

  

  

  

  

  

  

  *Hunt, 
  1882 
  ; 
  sea 
  

   shore 
  

  

  

  

  

  

  

  

  

  

  Forel, 
  1895; 
  Lake 
  

   Geneva. 
  

  

  

  0-8-8 
  

  

  

  

  

  

  

  

  Siau, 
  1841 
  ; 
  sea 
  

   shore 
  St. 
  Giles, 
  

   Bourbon 
  

  

  10-15 
  

  

  3-5 
  

  

  gravelly 
  

   sand 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  a 
  The 
  symbols 
  of 
  the 
  first 
  five 
  columns 
  same 
  as 
  those 
  used 
  on 
  Table 
  II; 
  "k 
  = 
  length 
  of 
  water- 
  

   waves; 
  a 
  = 
  amplitude 
  of 
  water-waves; 
  r 
  = 
  their 
  period; 
  c= 
  their 
  velocity; 
  v 
  = 
  the 
  corre- 
  

   sponding 
  current 
  velocity 
  at 
  contact 
  with 
  sediment. 
  

  

  b 
  Computed 
  from 
  data 
  given 
  in 
  original 
  papers. 
  (Approximate 
  maxima 
  only; 
  true 
  velocities 
  

   probably 
  smaller.) 
  

  

  c 
  k 
  = 
  constant. 
  

  

  The 
  figures 
  taken 
  from 
  authors 
  marked 
  with 
  an 
  asterisk 
  transformed 
  from 
  inches 
  to 
  nearest 
  

   mm. 
  

  

  