﻿436 
  F. 
  Waldo 
  — 
  Wind 
  Velocities 
  in 
  the 
  United 
  States. 
  

  

  level. 
  For 
  the 
  central 
  coast 
  the 
  curve 
  is 
  quite 
  similar 
  to 
  that 
  

   for 
  July, 
  but 
  the 
  phases 
  are 
  not 
  so 
  great 
  in 
  amplitude 
  and 
  the 
  

   slopes 
  of 
  the 
  max. 
  are 
  not 
  so 
  steep. 
  At 
  the 
  south 
  there 
  is 
  a 
  

   well 
  rounded 
  max. 
  which 
  rises 
  for 
  half 
  the 
  day 
  above 
  a 
  nearly 
  

   level 
  min. 
  period 
  ; 
  the 
  whole 
  curve 
  exhibiting 
  phases 
  about 
  

   half 
  way 
  between 
  those 
  for 
  January 
  and 
  July. 
  

  

  At 
  the 
  high 
  station 
  of 
  Cape 
  Mendocino 
  the 
  curve 
  for 
  the 
  

   first 
  half 
  of 
  the 
  day 
  resembles 
  that 
  for 
  July, 
  while 
  for 
  the 
  

   latter 
  half 
  of 
  the 
  day 
  it 
  is 
  similar 
  to 
  that 
  for 
  January 
  for 
  the 
  

   same 
  hours 
  ; 
  but 
  the 
  amplitudes 
  are 
  less 
  than 
  for 
  those 
  months. 
  

  

  Having 
  mentioned 
  the 
  Coast 
  regions, 
  we 
  now 
  pass 
  to 
  the 
  

   various 
  Inland 
  sections 
  of 
  the 
  U. 
  S. 
  

  

  Inland: 
  Northeastern 
  U. 
  S. 
  (Curve 
  9). 
  — 
  For 
  January 
  there 
  

   is 
  a 
  well 
  marked 
  maximum 
  rising, 
  for 
  about 
  ten 
  hours 
  of 
  the 
  

   day, 
  above 
  an 
  irregular 
  min. 
  period, 
  which 
  has 
  in 
  some 
  cases 
  

   faint 
  secondary 
  phases. 
  The 
  crest 
  of 
  the 
  max. 
  is 
  fairly 
  well 
  

   rounded, 
  but 
  flattens 
  out 
  (showing 
  less 
  rapid 
  changes) 
  with 
  

   progress 
  southward. 
  

  

  For 
  July 
  the 
  maximum 
  period 
  is 
  above 
  the 
  nearly 
  flat 
  min. 
  

   period 
  for 
  about 
  fourteen 
  hours 
  ; 
  in 
  most 
  cases 
  the 
  crest 
  is 
  

   well 
  rounded 
  but 
  it 
  becomes 
  flatter 
  toward 
  the 
  south. 
  

  

  For 
  the 
  Year 
  the 
  minimum 
  period 
  is 
  usually 
  still 
  more 
  flat- 
  

   tened 
  out 
  than 
  in 
  the 
  cases 
  just 
  mentioned, 
  and 
  the 
  maximum 
  

   portions 
  of 
  the 
  curves 
  are 
  nearly 
  as 
  pronounced 
  as 
  for 
  July 
  but 
  

   do 
  not 
  extend 
  over 
  quite 
  as 
  many 
  hours. 
  The 
  curves 
  for 
  the 
  

   Year 
  are 
  unusually 
  similar 
  to 
  those 
  for 
  July, 
  and 
  in 
  each 
  very 
  

   little 
  secondary 
  influence 
  is 
  noticeable. 
  

  

  Southeastern 
  TJ. 
  S. 
  — 
  For 
  January 
  the 
  maximum 
  rice 
  is 
  well 
  

   marked, 
  but 
  does 
  not 
  cover 
  a 
  period 
  of 
  over 
  eight 
  to 
  ten 
  hours, 
  

   and 
  the 
  minimum 
  is 
  rather 
  more 
  regularly 
  level 
  than 
  is 
  usual 
  

   in 
  mid-winter. 
  For 
  the 
  relatively 
  high 
  exposure 
  at 
  Atlanta 
  

   (Curve 
  10) 
  there 
  is 
  but 
  slight 
  absolute 
  variation, 
  although 
  there 
  

   is 
  a 
  noticeable 
  max. 
  succeeded 
  almost 
  immediately 
  by 
  a 
  rapid 
  

   descent 
  to 
  a 
  narrow 
  minimum. 
  

  

  For 
  July 
  the 
  max. 
  covers 
  a 
  wider 
  period 
  than 
  for 
  January, 
  

   and 
  is 
  more 
  strongly 
  marked 
  (except 
  at 
  Jacksonville), 
  while 
  the 
  

   curve 
  of 
  descent 
  becomes 
  steeper 
  and 
  the 
  max. 
  retarded 
  until 
  a 
  

   later 
  hour. 
  The 
  minimum 
  period 
  is 
  hardly 
  as 
  level 
  as 
  for 
  

   January. 
  At 
  the 
  high 
  exposure 
  of 
  Atlanta 
  a 
  slight 
  secondary 
  

   minimum 
  is 
  present. 
  

  

  For 
  the 
  Year 
  the 
  maximum 
  is 
  well 
  developed 
  and 
  the 
  curve 
  

   well 
  rounded, 
  with 
  a 
  gradual 
  ascent 
  and 
  a 
  slightly 
  sharper 
  

   descent, 
  and 
  extends 
  for 
  about 
  twelve 
  hours 
  above 
  the 
  smooth^ 
  

   slightly 
  sloping, 
  minimum 
  period. 
  At 
  the 
  high 
  exposure 
  of 
  

   Atlanta 
  the 
  curve 
  resembles 
  that 
  for 
  July 
  but 
  has 
  a 
  more 
  

   rounded 
  maximum 
  with 
  slight 
  secondary 
  phases. 
  

  

  Lower 
  Mississippi 
  River 
  Region 
  (Curves 
  11 
  and 
  12). 
  — 
  

   For 
  January 
  the 
  curves 
  are 
  very 
  irregular 
  and 
  suffer 
  but 
  slight 
  

  

  