SCIENCE 



^mibm 



NEWSEE.E3 Friday, November 12, 1920 sn.Gi.E copies, is cis. 



Vol. LII, No. 1350 ' ' Annual Subsoeiption, 96.00 



B 1 a k i s t i> n 



sa * 



Patten \ 



The Early Embryolo^l Of 

 The Chick 



By Bradley M. Patten 



School of Medicine, Western Reserve University 

 With 55 Illustrations, (182 Figures), Cloth, $2.25 Postpaid 



A Book of the Essentials 



OpO A STUDENT beginning the study of embryology the very 

 ■■■ abundance of information available in the literature of the subject 

 is confusing and discouraging. He is unable to cull the essentials and 

 fit them together in their proper relationships and is likely to become 

 hopelessly lost in a maze of details. This book was vi^ritten in an eflfbrt 

 to set forth for him in brief and simple form the early embryology of 

 the chick. It does not purport to treat the subject from the compara- 

 tive view point,, nor to be a reference work. It helps the student to 

 grasp the structure of the embryos, and the sequence and significance 

 of the processes he encounters in his work on the chick, and thereby 

 conserves the time of the instructor for interpretation of the broader 

 principles of embryology. 



P. Blakiston's Son & Co., Puwishers. Philadelphia 



