‘SN ISO'S M T 
APRIL] Price Is. [1889. 
J. W. ROBINS, 
TRANSACTIONS 
OF THE 
HERTFORDSHIRE 
NATURAL HISTORY SOCIETY 
AND 
FIELD CLUB. 
EDITED BY JOHN HOPKINSON, F.L.S., F.G.S . 
VOL. V. PART 4. 
CONTENTS : 
PAGK 
10. Birds : their Nests and Habits. By George Booper, F.Z.S, 
97 
11. Anniversary Address: Structural Variations in the the Eyes of Animals in 
reference to their Function. By the President, F. Maule Campbell, F.L.S., 
F.Z.S., F.R.M.S., F.E.S. 
107 
LONDON: 
GIJBNEY & JACKSON, Successors to VAN VOORST, PATERNOSTER ROW. 
HERTFORD: 
STEPHEN AUSTIN AND SONS, PRINTERS, FORE STREET. 
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1 
1889, 
