One Vol., Royal Svo. 30s. 



HELIGOLAND 



AS AN 



ORNITHOLOGICAL OBSERVATORY 



THE RESULT OF FIFTY YEARS' EXPERIENCE 



BY 



HEINRICH GATKE 



CORRESPONDING MEMBER OF THE ZOOLOGICAL SOCIETY OF LONDON, HONORARY MEMBER 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 ORNITHOLOOICAI. 



CENTRALE, AND MEMBER OF THE PERMANENT ORNITHOLOGICAI- COMMITTEE 



TRANSLATED BY 



RUDOLPH ROSENSTOCK, M.A. Oxon. 



9!i>t ifl »«« Sunt/ &tati i|l bit StnV, 



©fiC tfl itv 'Sctii, iai finEi bit Jarfptn von ^eljolant. 



EDINBURGH: DAVID DOUGLAS, 10 CASTLE STREET 



1895 



