﻿F. 
  Waldo 
  — 
  Wind 
  Velocities 
  in 
  the 
  United 
  States. 
  433 
  

  

  mum 
  (9*5 
  m. 
  p. 
  h.) 
  at 
  4 
  h 
  on 
  the 
  northern 
  and 
  6 
  b 
  on 
  the 
  Central 
  

   Coast 
  (7*5) 
  and 
  preceded 
  in 
  this 
  last 
  case 
  by 
  a 
  slight 
  secondary 
  

   maximum 
  at 
  3 
  h 
  ; 
  while 
  for 
  the 
  Tear 
  the 
  maximum 
  is 
  well 
  

   defined 
  at 
  16 
  h 
  on 
  the 
  northern 
  (14*5 
  m. 
  p. 
  h.) 
  and 
  at 
  15 
  h 
  on 
  the 
  

   southern 
  (12*5 
  m. 
  p. 
  li.) 
  coasts, 
  and 
  the 
  minima 
  occur 
  at 
  h 
  

   and 
  5 
  h 
  for 
  the 
  former 
  (nearly 
  13 
  m. 
  p. 
  h.) 
  and 
  about 
  22 
  h 
  and 
  4 
  h 
  

   for 
  the 
  latter 
  (10*5 
  m. 
  p. 
  h.), 
  and 
  in 
  both 
  cases 
  there 
  is 
  a 
  slight 
  

   secondary 
  maximum 
  at 
  3 
  h 
  . 
  

  

  For 
  the 
  ordinary 
  or 
  partially 
  sheltered 
  Atlantic 
  Coast 
  stations 
  

   (Curve 
  2) 
  at 
  which 
  the 
  land 
  influence 
  is 
  strongly 
  felt, 
  there 
  are 
  

   in 
  January 
  well 
  defined 
  primary 
  phases 
  of 
  max. 
  (about 
  12 
  

   in. 
  p. 
  h.) 
  and 
  min. 
  (about 
  9 
  or 
  10 
  m. 
  p. 
  h.), 
  but 
  the 
  secondary 
  

   phases 
  are 
  very 
  weak 
  and 
  the 
  curves 
  become 
  quite 
  flat 
  at 
  these 
  

   times. 
  The 
  max. 
  phase 
  becomes 
  more 
  marked 
  with 
  the 
  south- 
  

   ward 
  progress 
  from 
  the 
  north, 
  not 
  only 
  on 
  account 
  of 
  actual 
  

   increase 
  in 
  the 
  absolute 
  height 
  of 
  the 
  curves 
  (which 
  increase 
  

   perhaps 
  does 
  not 
  extend 
  to 
  places 
  south 
  of 
  the 
  Carolina 
  Coast) 
  

   but 
  also 
  on 
  account 
  of 
  the 
  fact 
  that 
  the 
  crest 
  of 
  the 
  curve 
  

   becomes 
  sharper 
  and 
  the 
  rise 
  and 
  fall 
  more 
  abrupt. 
  The 
  daily 
  

   curve 
  during 
  the 
  hours 
  of 
  deficiency 
  of 
  wind 
  (below 
  the 
  aver- 
  

   age) 
  becomes 
  more 
  flattened 
  out 
  and 
  of 
  greater 
  extent 
  in 
  the 
  

   south. 
  For 
  July 
  the 
  upward 
  swell 
  of 
  the 
  curve 
  is 
  very 
  much 
  

   broader 
  than 
  for 
  January, 
  throughout 
  the 
  whole 
  coast, 
  but 
  it 
  is 
  

   especially 
  so 
  at 
  the 
  south. 
  The 
  extreme 
  maximum 
  is 
  more 
  

   pronounced 
  in 
  all 
  cases, 
  but 
  is 
  most 
  so 
  at 
  the 
  north. 
  At 
  this 
  

   season 
  there 
  is 
  a 
  remarkable 
  similarity 
  in 
  the 
  length 
  of 
  the 
  

   swell 
  of 
  the 
  curves 
  (about 
  16 
  hours 
  duration) 
  throughout 
  the 
  

   whole 
  coast. 
  

  

  For 
  the 
  depressions 
  of 
  the 
  curves 
  (i. 
  e. 
  periods 
  of 
  least 
  wind) 
  

   a 
  greater 
  irregularity 
  is 
  noticeable 
  at 
  the 
  north, 
  where 
  slight 
  

   secondary 
  phases 
  are 
  visible. 
  

  

  For 
  the 
  Year, 
  as 
  might 
  be 
  expected, 
  the 
  curves 
  possess 
  char- 
  

   acteristics 
  between 
  those 
  for 
  January 
  and 
  July 
  : 
  but 
  they 
  

   resemble 
  the 
  latter 
  very 
  much 
  more 
  closely 
  than 
  they 
  do 
  the 
  

   former. 
  The 
  crest 
  of 
  the 
  curve 
  is, 
  however, 
  more 
  rounded 
  for 
  

   the 
  Year 
  than 
  for 
  July 
  ; 
  but 
  the 
  amplitude 
  is 
  not 
  quite 
  so 
  great, 
  

   nor 
  the 
  period 
  of 
  excess 
  above 
  the 
  nearly 
  level 
  portion 
  of 
  the 
  

   curve 
  at 
  the 
  minimum 
  quite 
  so 
  long, 
  the 
  latter 
  for 
  the 
  Year 
  

   being 
  about 
  half 
  of 
  the 
  twenty-four 
  hours. 
  

  

  Gulf 
  of 
  Mexico 
  Coast. 
  — 
  The 
  eastern, 
  western, 
  and 
  north- 
  

   western 
  coasts 
  are 
  represented 
  (Curves 
  3 
  and 
  4). 
  For 
  January 
  

   there 
  is 
  but 
  slight 
  absolute 
  change 
  in 
  the 
  irregular 
  curves 
  for 
  

   these 
  three 
  coast 
  sections. 
  The 
  curves 
  for 
  the 
  extreme 
  eastern 
  

   and 
  western 
  coasts 
  are 
  somewhat 
  similar 
  as 
  to 
  the 
  times 
  of 
  the 
  

   phases, 
  but 
  the 
  early 
  afternoon 
  maximum 
  (at 
  about 
  15 
  h 
  ) 
  is 
  

   much 
  more 
  strongly 
  marked 
  in 
  the 
  west 
  than 
  in 
  the 
  east. 
  In 
  

   the 
  northwestern 
  part 
  (Galveston, 
  Texas) 
  the 
  amplitude 
  is 
  not 
  

  

  