﻿432 
  

  

  ANNUAL 
  REPORT 
  SMITHSONIAN 
  INSTITUTION, 
  19 
  2 
  9 
  

  

  intellectual 
  well-being 
  in 
  the 
  region 
  of 
  the 
  thirtieth 
  degree 
  of 
  latitude 
  

   (Egypt 
  and 
  Babylonia); 
  from 
  600 
  to 
  300 
  B. 
  C. 
  between 
  the 
  thirty-fifth 
  

   and 
  fortieth 
  degrees 
  (Greece) 
  ; 
  from 
  300 
  B. 
  C. 
  to 
  400 
  A. 
  D. 
  between 
  the 
  

  

  -1810 
  

  

  -530 
  

  

  . 
  J 
  

  

  2300 
  

  

  2200 
  

  

  2100 
  

  

  2000 
  

  

  (900 
  

  

  1800 
  

  

  !700 
  

  

  loOO 
  

  

  1500 
  

  

  1400 
  

  

  1300 
  

  

  (200 
  SXJ 
  

  

  1100 
  

  

  1000 
  

  

  900 
  

  

  800 
  

  

  700 
  

  

  600 
  

  

  500 
  

  

  400 
  

  

  300 
  

  

  200 
  

  

  !00 
  

  

  O 
  

  

  30 
  

  

  -750 
  

  

  -i390 
  

  

  iOO 
  V 
  

  

  200 
  3 
  

  

  300 
  ^ 
  

  

  400 
  

  

  500 
  

  

  600 
  

  

  700 
  

  

  800 
  

  

  900 
  

   iOOO 
  w 
  

   liOO 
  ^ 
  

   1200 
  O 
  

   1300 
  

   1400 
  

   1500 
  

   1600 
  

   1700 
  

   S800 
  

   1900 
  

  

  D 
  

  

  O 
  

  

  CD 
  

  

  Figure 
  2. 
  — 
  A, 
  From 
  Brooks' 
  "Eurasia," 
  Figure 
  38,«in 
  Climate 
  Ttirough 
  the 
  Ages. 
  B, 
  From 
  Brooks' 
  

   "Western 
  Asia," 
  Figure 
  35, 
  in 
  Climate 
  Through 
  the 
  Ages. 
  (A 
  and 
  B 
  by 
  permission 
  of 
  the 
  author 
  and 
  

   Messrs. 
  Ernest 
  Benn, 
  Ltd.) 
  C, 
  Pearson's 
  graph 
  from 
  the 
  Geological 
  Magazine, 
  1901. 
  D, 
  Graph 
  repre 
  

   senting 
  historical 
  fluctuations; 
  the 
  "crest" 
  line 
  represents 
  periods 
  of 
  stability 
  and 
  settlement, 
  and 
  the 
  

   "trough" 
  line 
  periods 
  of 
  distm'banc* 
  and 
  migration. 
  In 
  A, 
  B, 
  and 
  C 
  the 
  dotted 
  lines 
  are 
  inserted 
  to 
  in- 
  

   dicate 
  the 
  divergence 
  of 
  Brooks' 
  and 
  Pearson's 
  graphs 
  from 
  the 
  640-year 
  cycles 
  

  

  fortieth 
  and 
  forty-fifth 
  degrees 
  (Rome); 
  from 
  800 
  to 
  100 
  A. 
  D. 
  

   between 
  the 
  forty-fifth 
  and 
  fiftieth 
  degrees 
  (France 
  and 
  northern 
  

   Italy); 
  and 
  finally 
  after 
  1000 
  A. 
  D. 
  between 
  the 
  fiftieth 
  and 
  fifty-fiftli 
  

  

  