PROGRESS OF SCIENCE 

 IN THE CENTURY 



BY 

 J. ARTHUR THOMSON, M.A., 



Regius Professor of Natural History in the University of Aberdeen ; Author oj 



" The Study of Animal Life," " The Science of Life," " Outlines of 



Zoology" etc; Joint-Author of u The Evolution of Sex." 



THE LINSCOTT PUBLISHING COMPANY 



TORONTO AND PHILADELPHIA 

 LONDON : 47 Paternoster Row 



VV. & R. CHAMBERS, LIMITED 



EDINBURGH : 339 High Street 

 1906 



