﻿594 
  AISTNUAL 
  KEPORT 
  SMITHSONIAN 
  INSTITUTION, 
  192 
  9 
  

  

  1902-1909. 
  Investigator, 
  fundamental 
  problems 
  of 
  geology, 
  Carnegie 
  Institu- 
  

   tion 
  of 
  Washington. 
  

  

  Consulting 
  geologist, 
  Wisconsin 
  Geological 
  Survey. 
  

  

  1908—. 
  Consulting 
  geologist, 
  United 
  States 
  Geological 
  Survey. 
  

  

  1909-1928. 
  Research 
  associate, 
  Carnegie 
  Institution 
  of 
  Washington. 
  

  

  1909. 
  Made 
  a 
  study 
  of 
  fundamental 
  principles 
  of 
  geology, 
  especiaUy 
  the 
  study 
  

   of 
  the 
  old 
  hypotheses 
  of 
  the 
  origin 
  of 
  the 
  earth 
  and 
  the 
  solar 
  system, 
  destructive 
  

   criticism 
  of 
  these 
  (in 
  connection 
  with 
  F. 
  R. 
  Moulton) 
  and 
  their 
  final 
  rejection, 
  

   and 
  the 
  development 
  of 
  an 
  entirely 
  new 
  hypothesis 
  now 
  known 
  as 
  the 
  planetesimal 
  

   hypothesis. 
  This 
  view 
  has 
  been 
  widely, 
  though 
  as 
  yet 
  not 
  universaUy, 
  accepted. 
  

   It 
  is 
  perhaps 
  Doctor 
  Chamberlin's 
  greatest 
  contribution 
  to 
  science. 
  

  

  Developed 
  a 
  radically 
  new 
  view 
  of 
  the 
  history 
  of 
  the 
  atmosphere 
  (from 
  a 
  kev 
  

   derived 
  from 
  G. 
  Johnstone 
  Stoney). 
  

  

  Made 
  a 
  study 
  of 
  tidal 
  problems. 
  

  

  Carried 
  on 
  diastrophic 
  studies, 
  basing 
  the 
  great 
  epochs 
  of 
  earth 
  history 
  on 
  

   changes 
  in 
  the 
  body 
  of 
  the 
  earth. 
  

  

  1919-1928. 
  Professor 
  emeritus, 
  department 
  of 
  geology, 
  University 
  of 
  Chicago. 
  

  

  