TRANSLATOR'S PREFACE. 



The deplorable fact that numerous important contributions to 

 medical literature," appearing in the German language, remain 

 unread by the English-speaking fraternity as the result of an im- 

 perfect acquaintance with that tongue, induced me to undertake 

 the translation of this valuable study of one of the youngest 

 human ova found in situ. When requested to do this work by 

 my esteemed former chief, Prof. Dr. Leopold, I was impressed 

 with the necessity of preventing the English-speaking profession 

 from remaining unacquainted with a work of such high order. 



This book should prove interesting and instructive not only 

 to the embryologist and the obstetrician, but also to the profession 

 in general, and if by its translation I shall have succeeded in dis- 

 seminating a clearer knowledge of this complex subject, I shall 

 feel amply repaid for my labor. 



In conclusion I wish to thank my friend and colleague, . Dr. 

 Hugo Ehrenfest, for the very kind and valuable assistance which 

 he rendered me in the translation of the book, and I also wish 

 to express my indebtedness to Mr. Geo. Heithaus, stud. med.. 

 for his aid in the reading of the proofs. 



W. H. VOGT, M. D. 

 St. Louis, Mo., September, 1907. 4977 Lotus Ave. 



