﻿434 
  F. 
  Waldo 
  — 
  Wind 
  Velocities 
  in 
  the 
  United 
  States. 
  

  

  so 
  great, 
  and 
  the 
  ill 
  defined 
  erest 
  is 
  several 
  hours 
  earlier 
  than 
  

   in 
  the 
  other 
  sections 
  just 
  mentioned. 
  

  

  For 
  JuVy, 
  in 
  the 
  eastern 
  part, 
  a 
  well 
  defined 
  and 
  gradual 
  but 
  

   not 
  excessive 
  maximum 
  rises 
  above 
  a 
  fairly 
  level 
  period 
  of 
  

   deficiency, 
  there 
  being 
  no 
  strongly 
  marked 
  individual 
  mini- 
  

   mum 
  ; 
  but 
  in 
  the 
  northwestern 
  part 
  the 
  maximum 
  and 
  mini- 
  

   mum 
  are 
  very 
  sharply 
  marked, 
  in 
  each 
  case 
  the 
  curve 
  comes 
  to 
  

   a 
  point, 
  the 
  amplitude 
  is 
  rather 
  large 
  for 
  a 
  coast 
  exposure 
  and 
  

   the 
  time 
  of 
  maximum 
  (at 
  17 
  h 
  ) 
  is 
  considerably 
  retarded 
  as 
  com- 
  

   pared 
  with 
  that 
  in 
  the 
  eastern 
  part 
  (at 
  12 
  h 
  ). 
  In 
  the 
  extreme 
  

   western 
  part 
  (at 
  Corpus 
  Christi) 
  a 
  curve 
  of 
  very 
  marked 
  pecu- 
  

   liarities 
  presents 
  itself 
  ; 
  it 
  has 
  a 
  single 
  rather 
  sharply 
  defined 
  

   minimum 
  of 
  5 
  m. 
  p. 
  h. 
  at 
  (5 
  h 
  ) 
  about 
  the 
  same 
  time 
  as 
  in 
  the 
  

   northwestern 
  part, 
  and 
  a 
  very 
  high 
  but 
  round-crested 
  maxi- 
  

   mum 
  of 
  nearly 
  15*5 
  m. 
  p. 
  h. 
  (at 
  14 
  h 
  to 
  18 
  h 
  ) 
  with 
  very 
  steeply 
  

   inclined 
  sides 
  which 
  extend 
  to 
  the 
  sharp 
  angle 
  of 
  the 
  mini- 
  

   mum 
  with 
  as 
  rapid 
  a 
  slope 
  throughout 
  the 
  whole 
  length 
  as 
  is 
  

   ordinarily 
  observed 
  for 
  inland 
  stations 
  at 
  about 
  (or 
  a 
  little 
  

   after) 
  the 
  noon 
  hour. 
  It 
  is 
  seen 
  that 
  the 
  whole 
  amplitude 
  of 
  

   fluctuation 
  thus 
  becomes 
  enormously 
  great 
  (over 
  10 
  m. 
  p. 
  h.). 
  

  

  For 
  the 
  Y~ear, 
  in 
  the 
  eastern 
  and 
  northwestern 
  parts 
  the 
  

   maximum 
  is 
  well 
  marked 
  but 
  the 
  crest 
  of 
  the 
  curve 
  is 
  very 
  

   much 
  flattened 
  ; 
  and 
  there 
  is 
  in 
  both 
  cases 
  a 
  nearly 
  level 
  mini- 
  

   mum 
  for 
  about 
  half 
  of 
  the 
  twenty-four 
  hours, 
  with 
  a 
  rather 
  steep 
  

   but 
  slight 
  increase 
  to 
  a 
  nearly 
  level 
  maximum 
  which 
  lasts 
  for 
  

   six 
  hours. 
  At 
  the 
  extreme 
  west 
  there 
  is 
  an 
  open 
  and 
  very 
  

   well 
  rounded 
  maximum 
  and 
  a 
  well 
  rounded 
  minimum 
  with 
  a 
  

   steep 
  ascent, 
  but 
  with 
  a 
  more 
  gradual 
  descent 
  connecting 
  the 
  

   two 
  : 
  the 
  amplitude 
  is 
  about 
  the 
  same 
  as 
  that 
  for 
  an 
  ordinary 
  

   inland 
  station. 
  

  

  The 
  Great 
  Lakes 
  (Curve 
  5). 
  — 
  In 
  January 
  the 
  curves 
  are 
  

   nearly 
  all 
  irregular, 
  but 
  the 
  amplitudes 
  of 
  the 
  irregularities 
  are 
  

   not 
  great. 
  The 
  early 
  afternoon 
  maximum, 
  although 
  slight, 
  is 
  

   plainly 
  marked 
  in 
  all 
  cases 
  : 
  it 
  is 
  sometimes 
  rounded 
  and 
  some- 
  

   times 
  sharp-crested 
  ; 
  that 
  for 
  the 
  lesser 
  absolute 
  wind 
  velocity 
  

   being 
  usually 
  the 
  more 
  rounded, 
  and 
  that 
  for 
  the 
  greater 
  wind, 
  

   which 
  indicates 
  a 
  better 
  water 
  exposure, 
  becoming 
  sharper. 
  

   The 
  nearly 
  flat 
  minimum 
  portion 
  of 
  the 
  curve 
  is 
  usually 
  some- 
  

   what 
  lower 
  for 
  the 
  hours 
  succeeding 
  midnight, 
  than 
  for 
  the 
  

   hours 
  just 
  preceding 
  it. 
  Secondary 
  phases 
  are 
  quite 
  plainly 
  

   shown 
  in 
  some 
  of 
  the 
  curves. 
  

  

  In 
  July 
  the 
  max. 
  is 
  well 
  rounded 
  and 
  strongly 
  marked 
  on 
  

   all 
  of 
  the 
  curves, 
  and 
  this 
  period 
  covers 
  more 
  than 
  half 
  of 
  the 
  

   twenty-four 
  hours 
  in 
  most 
  cases. 
  When 
  the 
  minimum 
  portion 
  

   follows 
  midnight 
  it 
  is 
  in 
  many 
  cases 
  a 
  little 
  higher 
  than 
  when 
  

   preceding 
  it, 
  and 
  is 
  consequently 
  somewhat 
  of 
  a 
  reversal 
  of 
  the 
  

   conditions 
  for 
  January. 
  Secondary 
  phases 
  are 
  not 
  present. 
  

  

  