THE 

 WONDER OF LIFE 



B7 

 J. ARTHUR THOMSON, M.A., LL.D 



Regius Professor of Natural History in the University of Aberdeen. 



Author of 'The Biology of the Seasons,' 'Darwinism and 



Human Life,' 'Heredity,' 'The Study of Animal 



Life,' 'Introduction to Science,' etc., etc 



NEW YORK 

 HENRY HOLT AND COMPANY 

 LONDON: ANDiiEW MELROSE LTD 



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