COLUMBIA UNIVERSITY BIOLOGICAL SERIES. IV. 



THE CELL 



IN 



DEVELOPMENT AND INHERITANCE 



BY 



EDMUND B. fWILSON, PH.D. 



PROFESSOR OF ZOGLOGYTCOLUMBIA UNIVERSITY 



SECOND EDITION 

 REVISED AND ENLARGED 



1 Natura nusquam magis est tota quam in minimis " 



PLINY 



THE MACMILLAN COMPANY 



LONDON: MACMILLAN & CO., LTD. 

 I9II 



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