﻿REPORT 
  OF 
  THE 
  SECRETARY. 
  121 
  

  

  The 
  seventeen-year 
  locust, 
  by 
  R. 
  E. 
  Snodgrass. 
  

  

  Entomology 
  and 
  the 
  war, 
  by 
  L. 
  O. 
  Howard. 
  

  

  Two 
  types 
  of 
  southwestern 
  cliff 
  houses, 
  by 
  J. 
  Walter 
  Fewkes. 
  

  

  On 
  the 
  race 
  history 
  and 
  facial 
  characteristics 
  of 
  the 
  aboriginal 
  Americans, 
  by 
  

  

  W. 
  H. 
  Holmes. 
  

   The 
  opportunity 
  for 
  American 
  archeological 
  research 
  in 
  Palestine, 
  by 
  James 
  

  

  A. 
  Montgomery. 
  

   The 
  differentiation 
  of 
  mankind 
  Into 
  racial 
  types, 
  by 
  Arthur 
  Keith. 
  

   The 
  exploration 
  of 
  Manchuria, 
  by 
  Arthur 
  de 
  C. 
  Sowerby. 
  

   The 
  origin 
  and 
  beginnings 
  of 
  the 
  Czechoslovak 
  people, 
  by 
  Jindfich 
  Matiegka. 
  

   Geographic 
  education 
  in 
  America, 
  by 
  Albert 
  Perry 
  Brigharn. 
  

   Progress 
  in 
  national 
  land 
  reclamation 
  in 
  the 
  United 
  States, 
  by 
  C. 
  A. 
  Bissell. 
  

   Richard 
  Rathbun, 
  by 
  Marcus 
  Benjamin. 
  

   A 
  great 
  chemist: 
  Sir 
  William 
  Ramsay, 
  by 
  Ch. 
  Moureu. 
  

  

  REPORT 
  FOR 
  19 
  20. 
  

  

  The 
  complete 
  volume 
  of 
  the 
  Annual 
  Report 
  of 
  the 
  Regents 
  for 
  

   1920 
  was 
  received 
  from 
  the 
  Public 
  Printer 
  in 
  May, 
  1922. 
  

  

  Annual 
  Report 
  of 
  the 
  Board 
  of 
  Regents 
  of 
  the 
  Smithsonian 
  Institution, 
  show- 
  

   ing 
  operations, 
  expenditures, 
  and 
  condition 
  of 
  the 
  Institution 
  for 
  the 
  year 
  

   ending 
  June 
  30, 
  1920. 
  704 
  pp., 
  230 
  pis., 
  105 
  text 
  figs. 
  (Publ. 
  2622.) 
  

  

  The 
  appendix 
  contained 
  the 
  following 
  papers 
  : 
  

  

  Studying 
  the 
  sun's 
  heat 
  on 
  mountain 
  peaks 
  in 
  desert 
  lands, 
  by 
  C. 
  G. 
  Abbot. 
  

  

  The 
  habitability 
  of 
  Venus, 
  Mars, 
  and 
  other 
  worlds, 
  by 
  C. 
  G. 
  Abbot. 
  

  

  Giant 
  suns, 
  by 
  H. 
  H. 
  Turner. 
  

  

  A 
  bundle 
  of 
  meteorological 
  paradoxes, 
  by 
  W. 
  J. 
  Humphreys. 
  

  

  The 
  determination 
  of 
  the 
  structure 
  of 
  crystals, 
  by 
  Ralph 
  W. 
  G. 
  Wyckoff. 
  

  

  Dr. 
  Aston's 
  experiments 
  on 
  the 
  mass 
  spectra 
  of 
  the 
  chemical 
  elements, 
  with 
  

   introduction 
  by 
  C. 
  G. 
  Abbot. 
  

  

  Vitamins, 
  by 
  W. 
  D. 
  Halliburton. 
  

  

  Soil 
  acidity 
  — 
  its 
  nature, 
  measurement, 
  and 
  relation 
  to 
  plant 
  distribution, 
  by 
  

   Edgar 
  T. 
  Wherry. 
  

  

  The 
  chemistry 
  of 
  the 
  earth's 
  crust, 
  by 
  Henry 
  S. 
  Washington. 
  

  

  Major 
  causes 
  of 
  land 
  and 
  sea 
  oscillations, 
  by 
  E. 
  O. 
  Ulrich. 
  

  

  The 
  Bryozoa, 
  or 
  moss 
  animals, 
  by 
  R. 
  S. 
  Bassler. 
  

  

  The 
  horned 
  dinosaurs, 
  by 
  Charles 
  W. 
  Gilmore. 
  

  

  Rhythm 
  in 
  nature, 
  by 
  P. 
  W. 
  Flattely. 
  

  

  Parasitism 
  and 
  symbiosis 
  in 
  their 
  relation 
  to 
  the 
  problem 
  of 
  evolution, 
  by 
  

   Maurice 
  Caullery. 
  

  

  Local 
  suppression 
  of 
  agricultural 
  pests 
  by 
  birds, 
  by 
  W. 
  L. 
  McAtee. 
  

  

  The 
  occult 
  senses 
  in 
  birds, 
  by 
  Herbert 
  H. 
  Beck. 
  

  

  Adventures 
  in 
  the 
  life 
  of 
  a 
  fiddler 
  crab, 
  by 
  O. 
  W. 
  Hyman. 
  

  

  The 
  senses 
  of 
  insects, 
  by 
  N. 
  E. 
  Mclndoo. 
  

  

  The 
  resplendent 
  shield-bearer 
  and 
  the 
  ribbed 
  cocoon-maker: 
  Two 
  insect 
  in- 
  

   habitants 
  of 
  the 
  orchard, 
  by 
  R. 
  E. 
  Snodgrass. 
  

  

  The 
  origin 
  of 
  insect 
  societies, 
  by 
  Auguste 
  Lameere. 
  

  

  The 
  botanical 
  gardens 
  of 
  Jamaica, 
  by 
  William 
  R. 
  Maxon. 
  

  

  Daturas 
  of 
  the 
  old 
  world 
  and 
  new: 
  An 
  account 
  of 
  their 
  narcotic 
  properties 
  

   and 
  their 
  use 
  in 
  oracular 
  and 
  initiatory 
  ceremonies, 
  by 
  William 
  E. 
  Safford. 
  

  

  Effect 
  of 
  the 
  relative 
  length 
  of 
  day 
  and 
  night 
  on 
  flowering 
  and 
  fruiting 
  of 
  

   plants, 
  by 
  W. 
  W. 
  Garner 
  and 
  H. 
  A. 
  Allard. 
  

  

  Fire 
  worship 
  of 
  the 
  Hopi 
  Indians, 
  by 
  J. 
  Walter 
  Fewkes. 
  

  

  