THE PHYSIOLOGY OF / 

 KEPRODUCTION 



BY 



FRANCIS H. A. MARSHALL 



M.A. (CANTAB.), D.Sc. (EoiN.) 



FELLOW OP CHRIST'S COLLEGE, CAMBRIDGE, AND UNIVERSITY LECTURER 

 IN AGRICULTURAL PHYSIOLOGY 



WITH A PREFACE BY 

 PROFESSOR E. A. SCHAFER, Sc.D., LL.D., F.R.S. 



AND CONTRIBUTIONS BY 

 WILLIAM CRAMER, PH.D., D.Sc. 



AND 



CHHEAD, M.A., M.D., B.Sc., F.R.C.S.E. 



WITH ILLUSTRATIONS 



LONGMANS, GREEN AND CO. 



39 PATERNOSTER ROW, LONDON 



NEW YORK, BOMBAY, AM) CALCUTTA 



1910 



All rights reserved 



