﻿REPORT 
  OF 
  THE 
  SECRETARY 
  19 
  

  

  at 
  present 
  practically 
  no 
  suitable 
  quarters, 
  and 
  the 
  great 
  apes, 
  of 
  

   which 
  the 
  park 
  has 
  a 
  valuble 
  collection, 
  are 
  now 
  so 
  housed 
  that 
  it 
  is 
  

   often 
  impossible 
  for 
  visitors 
  to 
  see 
  them. 
  Tentative 
  plans 
  for 
  a 
  mod- 
  

   ern, 
  hygienic 
  building 
  to 
  remedy 
  this 
  situation 
  have 
  been 
  prepared, 
  

   the 
  estimated 
  cost 
  being 
  $225,000. 
  

  

  ASTROPHYSICAL 
  OBSERVATORY 
  

  

  The 
  Smithsonian 
  Astrophysical 
  Observatory, 
  through 
  its 
  field 
  sta- 
  

   tions 
  on 
  Table 
  Mountain, 
  Calif., 
  and 
  Mount 
  Montezuma, 
  Chile, 
  and 
  

   the 
  cooperating 
  National 
  Geographic 
  Society 
  station 
  on 
  Mount 
  Bruk- 
  

   karos, 
  South 
  West 
  Africa, 
  has 
  continued 
  the 
  exact 
  measurement 
  of 
  

   the 
  intensity 
  of 
  the 
  radiation 
  of 
  the 
  sun 
  as 
  it 
  is 
  at 
  mean 
  solar 
  dis- 
  

   tance 
  outside 
  the 
  earth's 
  atmosphere. 
  The 
  California 
  and 
  the 
  Chile 
  

   observations, 
  having 
  reached 
  definitive 
  status, 
  now 
  concur 
  within 
  nar- 
  

   row 
  limits 
  in 
  their 
  determination 
  of 
  the 
  sun's 
  variation. 
  The 
  Monte- 
  

   zuma 
  values 
  of 
  the 
  solar 
  constant 
  are 
  published 
  by 
  the 
  Weather 
  

   Bureau 
  on 
  the 
  Washington 
  daily 
  weather 
  map. 
  

  

  Further 
  investigations 
  have 
  apparently 
  confirmed 
  three 
  definite 
  

   periodicities 
  previously 
  noticed 
  in 
  the 
  solar 
  variation 
  of 
  approxi- 
  

   mately 
  11, 
  15, 
  and 
  26 
  months. 
  

  

  At 
  the 
  Mount 
  Wilson, 
  Calif., 
  station, 
  Doctor 
  Abbot 
  and 
  Mr. 
  

   Freeman 
  repeated 
  with 
  richer 
  results 
  the 
  bolometric 
  determination 
  

   of 
  positions 
  of 
  solar 
  and 
  terrestrial 
  absorption 
  lines 
  and 
  bands 
  in 
  

   the 
  infra-red 
  solar 
  spectrum, 
  which 
  formed 
  the 
  main 
  subject 
  of 
  Vol- 
  

   ume 
  I 
  of 
  the 
  Annals 
  of 
  the 
  Astrophysical 
  Observatory. 
  Another 
  

   research 
  carried 
  through 
  at 
  Mount 
  Wilson 
  was 
  the 
  observation 
  of 
  the 
  

   distribution 
  of 
  energy 
  in 
  the 
  spectra 
  of 
  18 
  stars 
  and 
  of 
  the 
  planets 
  

   IVIars 
  and 
  Jupiter, 
  accomplished 
  by 
  Doctor 
  Abbot, 
  with 
  the 
  aid 
  of 
  

   Doctor 
  Adams, 
  of 
  the 
  Mount 
  Wilson 
  Observatory, 
  using 
  the 
  100- 
  

   inch 
  telescope 
  and 
  a 
  sensitive 
  radiometer. 
  

  

  Preparation 
  of 
  the 
  text 
  of 
  Volume 
  V 
  of 
  the 
  Annals, 
  to 
  contain 
  the 
  

   numerous 
  observations 
  since 
  1920, 
  was 
  begun 
  during 
  the 
  year, 
  and 
  

   it 
  is 
  hoped 
  that 
  the 
  volume 
  will 
  be 
  ready 
  for 
  publication 
  in 
  the 
  

   fiscal 
  year 
  1931. 
  

  

  INTERNATIONAL 
  CATALOGUE 
  OF 
  SCIENTIFIC 
  LITERATURE 
  

  

  Publication 
  of 
  the 
  International 
  Catalogue 
  was 
  suspended 
  in 
  1922 
  

   because 
  of 
  lack 
  of 
  financial 
  support, 
  but 
  the 
  United 
  States 
  bureau, 
  

   conforming 
  with 
  an 
  agreement 
  made 
  with 
  other 
  bureaus, 
  has 
  con- 
  

   tinued 
  to 
  keep 
  records 
  of 
  current 
  scientific 
  periodicals 
  and 
  to 
  do 
  other 
  

   necessary 
  work 
  in 
  order 
  that 
  actual 
  indexing 
  may 
  be 
  resumed 
  when 
  

   reorganization 
  of 
  the 
  catalogue 
  becomes 
  possible. 
  Expenses 
  have 
  

   been 
  kept 
  at 
  the 
  absolute 
  minimum 
  consistent 
  with 
  maintaining 
  the 
  

   bureau 
  intact. 
  

  

  82322—30 
  3 
  

  

  