﻿One 
  Vol., 
  Royal 
  8vo. 
  30s. 
  

  

  HELIGOLAND 
  

  

  AS 
  AN 
  

  

  ORNITHOLOGICAL 
  OBSERVATORY 
  

  

  THE 
  RESULT 
  OF 
  FIFTY 
  YEARS' 
  EXPERIENCE 
  

  

  BY 
  

  

  HEINRICH 
  GATKE 
  

  

  CORRESPONDING 
  MEMBER 
  OF 
  THE 
  ZOOLOGICAL 
  SOCIETY 
  OF 
  LONDON, 
  HONORARY 
  3IEMBER 
  OF 
  THE 
  

   BRITISH 
  ORNITHOLOGISTS' 
  UNION, 
  AND 
  OF 
  THE 
  AMERICAN 
  ORNITHOLOGISTS' 
  UNION, 
  HONORARY 
  

   MEMBER 
  OF 
  THE 
  NORFOLK 
  AND 
  NORWICH 
  NATURALISTS' 
  SOCIETY, 
  OF 
  THE 
  

   ORNITHOLOGISTS' 
  UNION 
  OF 
  VIENNA, 
  AND 
  THE 
  HUNGARIAN 
  ORNITHOLOGICAL 
  

   CENTRALE, 
  AND 
  MEMBER 
  OF 
  THE 
  PERMANENT 
  ORNITHOLOGICAL 
  COMMITTEE 
  

  

  TRANSLATED 
  BY 
  

  

  RUDOLPH 
  ROSENSTOCK, 
  M.A. 
  Oxon. 
  

  

  Tan 
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  5?«nr, 
  

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  Ifl 
  fctr 
  <?an&, 
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  fin& 
  tit 
  Jar&rn 
  von 
  £fIgof<itt&. 
  

  

  EDINBURGH: 
  DAVID 
  DOUGLAS, 
  10 
  CASTLE 
  STREET 
  

  

  1895 
  

  

  