﻿22 
  ANNUAL. 
  REPORT 
  SMITHSONIAN 
  INSTITUTION, 
  1922. 
  

  

  the 
  west 
  central 
  part 
  of 
  the 
  park, 
  which 
  was 
  practically 
  completed 
  

   during 
  the 
  year. 
  This 
  work 
  makes 
  available 
  for 
  the 
  exhibition 
  of 
  

   hoofed 
  animals 
  a 
  large 
  area 
  of 
  comparatively 
  level 
  ground. 
  Also 
  it 
  

   will 
  be 
  possible 
  to 
  greatly 
  improve 
  the 
  main 
  automobile 
  road 
  through 
  

   the 
  park. 
  Extensive 
  repairs 
  were 
  completed 
  on 
  the 
  antelope 
  house 
  

   and 
  the 
  older 
  bear 
  dens. 
  Three 
  large 
  outdoor 
  cages 
  were 
  built 
  for 
  

   certain 
  birds, 
  and 
  many 
  minor 
  repairs 
  were 
  completed 
  during 
  the 
  

   year. 
  The 
  most 
  urgent 
  need 
  of 
  the 
  park 
  is 
  now 
  a 
  suitable 
  restaurant 
  

   building 
  to 
  accommodate 
  the 
  greatly 
  increased 
  crowds 
  of 
  visitors. 
  

   The 
  present 
  small 
  building 
  is 
  in 
  bad 
  condition 
  and 
  is 
  entirely 
  in- 
  

   adequate 
  to 
  meet 
  the 
  needs 
  of 
  the 
  public. 
  A 
  suitable 
  building 
  could 
  

   be 
  erected, 
  using 
  lumber 
  in 
  the 
  possession 
  of 
  the 
  park 
  and 
  employing 
  

   the 
  regular 
  park 
  force, 
  for 
  about 
  $20,000. 
  Another 
  urgent 
  need 
  is 
  

   for 
  a 
  new 
  bird 
  house, 
  the 
  old 
  building, 
  erected 
  many 
  years 
  ago 
  as 
  a 
  

   temporary 
  relief, 
  being 
  in 
  a 
  very 
  bad 
  state 
  of 
  repair. 
  Moreover, 
  there 
  

   is 
  not 
  sufficient 
  space 
  for 
  the 
  very 
  valuable 
  and 
  interesting 
  collection 
  

   of 
  birds 
  and 
  there 
  is 
  far 
  too 
  little 
  room 
  for 
  visitors 
  in 
  the 
  public 
  

   aisles. 
  

  

  ASTROPHYSICAL 
  OBSERVATORY. 
  

  

  The 
  outstanding 
  feature 
  of 
  the 
  year's 
  work 
  was 
  the 
  publication 
  

   of 
  Volume 
  IV 
  of 
  the 
  Annals 
  of 
  the 
  Astrophysical 
  Observatory, 
  a 
  

   quarto 
  volume 
  of 
  390 
  pages, 
  which 
  covers 
  in 
  detail 
  the 
  work 
  of 
  the 
  

   years 
  1912 
  to 
  1920. 
  New 
  instruments 
  and 
  methods 
  of 
  observing 
  are 
  

   described 
  and 
  a 
  mass 
  of 
  solar 
  observations 
  is 
  presented 
  and 
  dis- 
  

   cussed. 
  Many 
  kinds 
  of 
  evidence 
  are 
  given 
  to 
  show 
  the 
  solar 
  vari- 
  

   ability, 
  and 
  reference 
  is 
  made 
  to 
  applications 
  of 
  the 
  results 
  which 
  

   have 
  been 
  made 
  by 
  several 
  meteorologists. 
  

  

  The 
  observing 
  station 
  erected 
  on 
  Mount 
  Harqua 
  Hala, 
  Ariz., 
  

   through 
  the 
  generosity 
  of 
  Mr. 
  John 
  A. 
  Roebling, 
  has 
  been 
  much 
  

   improved, 
  owing 
  to 
  the 
  zeal 
  of 
  Mr. 
  A. 
  F. 
  Moore, 
  in 
  charge 
  of 
  the 
  

   station. 
  Solar 
  constant 
  observations 
  were 
  made 
  on 
  upward 
  of 
  70 
  per 
  

   cent 
  of 
  the 
  days 
  of 
  the 
  year. 
  Comparisons 
  made 
  during 
  and 
  after 
  

   a 
  visit 
  by 
  the 
  director 
  show 
  no 
  change 
  in 
  the 
  scale 
  of 
  pyrheliometry, 
  

   so 
  that 
  the 
  results 
  from 
  this 
  station 
  are 
  comparable 
  with 
  those 
  at 
  

   Montezuma, 
  Chile. 
  Earlier 
  in 
  the 
  year 
  the 
  director 
  visited 
  the 
  

   station 
  at 
  Montezuma, 
  where 
  he 
  revised 
  all 
  the 
  adjustments 
  of 
  appa- 
  

   ratus 
  and 
  some 
  of 
  the 
  methods 
  employed 
  there. 
  

  

  In 
  June 
  the 
  director 
  and 
  Mr. 
  L. 
  B. 
  Aldrich 
  proceeded 
  to 
  the 
  

   Smithsonian 
  station 
  on 
  Mount 
  Wilson, 
  Calif., 
  where 
  a 
  beginning 
  

   was 
  made 
  toward 
  installing 
  new 
  " 
  solar 
  constant 
  " 
  apparatus 
  to 
  re- 
  

   place 
  that 
  removed 
  to 
  the 
  new 
  Arizona 
  station 
  in 
  1920. 
  By 
  antici- 
  

   pation 
  it 
  may 
  be 
  said 
  that 
  later 
  results 
  were 
  secured 
  on 
  the 
  dis- 
  

   tribution 
  of 
  energy 
  in 
  the 
  spectra 
  of 
  11 
  of 
  the 
  brighter 
  stars 
  by 
  

   bolometric 
  work 
  in 
  connection 
  with 
  the 
  hundred-inch 
  telescope, 
  and 
  

  

  