﻿404 
  

  

  H. 
  Arctowslci 
  — 
  Normal 
  Anomalies 
  of 
  the 
  

  

  This 
  fact 
  (5) 
  applies 
  at 
  least 
  to 
  the 
  Paris* 
  and 
  Genevaf 
  

   observations. 
  

  

  The 
  marked 
  departures 
  of 
  temperature 
  conditions 
  of 
  given 
  

   dates, 
  from 
  the 
  steady 
  seasonal 
  advance, 
  may 
  receive 
  three 
  

   different 
  interpretations 
  which 
  are 
  illustrated 
  by 
  the 
  following 
  

   diagram 
  (fig. 
  2) 
  : 
  

  

  Fig. 
  2. 
  Curve 
  " 
  A 
  " 
  expresses 
  the 
  hy- 
  

  

  pothesis 
  that 
  temperature 
  is 
  be- 
  

   low 
  the 
  normal 
  for 
  given 
  dates 
  

   " 
  Jc 
  " 
  and 
  that 
  " 
  a' 
  " 
  is 
  the 
  con- 
  

   tinuation 
  of 
  curve 
  "#". 
  This 
  

   represents 
  the 
  very 
  generally 
  ad- 
  

   mitted 
  hypothesis. 
  

  

  Curve 
  " 
  B 
  " 
  represents 
  the 
  

   anomaly 
  u 
  p 
  " 
  as 
  being 
  due 
  to 
  

   such 
  more 
  or 
  less 
  sudden 
  change 
  

   in 
  the 
  distribution 
  of 
  the 
  iso- 
  

   therms 
  that 
  " 
  b 
  " 
  belongs 
  to 
  a 
  

   curve 
  identical 
  to 
  " 
  a 
  " 
  but 
  

   shifted 
  downwards. 
  

  

  Curve 
  " 
  C 
  " 
  presupposes 
  a 
  rad- 
  

   ical 
  modification 
  of 
  the 
  annual 
  

   variation. 
  At 
  "g" 
  the 
  curve 
  

   " 
  5" 
  is 
  supposed 
  to 
  have 
  a 
  greater 
  

   amplitude 
  than 
  " 
  a 
  " 
  ; 
  at 
  " 
  r 
  " 
  

   curve 
  " 
  c" 
  is 
  supposed 
  to 
  have 
  a 
  

   smaller 
  amplitude 
  than 
  "J". 
  

   A 
  careful 
  examination 
  of 
  the 
  

   available 
  temperature 
  curves 
  shows 
  that 
  curve 
  "A" 
  may 
  be 
  

   discarded. 
  On 
  the 
  contrary 
  curves 
  " 
  B 
  " 
  and 
  ■" 
  C 
  " 
  must 
  both 
  

   be 
  taken 
  into 
  consideration. 
  

  

  As 
  a 
  typical 
  example 
  I 
  will 
  cite 
  the 
  temperature 
  curve 
  for 
  

   Warsaw. 
  

  

  The 
  utilized 
  daily 
  means 
  are 
  those 
  of 
  the 
  years 
  1826-18804 
  

   The 
  following 
  diagram 
  (fig. 
  3) 
  gives 
  an 
  interpretation 
  of 
  the 
  

   detailed 
  curve. 
  

  

  The 
  variation 
  is 
  composed 
  of 
  phases 
  1, 
  2, 
  3 
  and 
  4 
  belonging 
  

   to 
  four 
  concordant 
  curves. 
  The 
  steps 
  occur 
  approximately 
  at 
  

   the 
  following 
  dates 
  : 
  Jan. 
  25, 
  March 
  9, 
  April 
  22, 
  Oct. 
  2, 
  Nov. 
  

   29, 
  and 
  Dec7 
  16. 
  

  

  Then 
  during 
  the 
  summer, 
  on 
  the 
  contrary, 
  from 
  June 
  9th 
  

   till 
  July 
  28th, 
  we 
  have 
  practically 
  a 
  straight 
  line 
  of 
  mean 
  tem- 
  

  

  * 
  E. 
  Renou, 
  Annales 
  Bur. 
  Centr. 
  Met. 
  France, 
  1887, 
  i, 
  p. 
  B. 
  195. 
  

   •f 
  R. 
  Gautier 
  et 
  H. 
  Dnaime, 
  Arch. 
  Sc. 
  Pkys. 
  (4), 
  xy, 
  545, 
  1903. 
  

   \ 
  Jan 
  Kowalczyk, 
  Parn. 
  Fizjogr., 
  Warsaw, 
  1881. 
  

  

  