QC 



\F006169 



KuppFER's VESICLE 



AND ITS 



RELATION TO GASTRULATION AND 

 CONCRESCENCE, 



FRANCIS BERTODY SUMNER. 



[Reprinted from Memoirs New York Academy of Sciences, Volume II, Part II, J900.1 



Submitted in partial fulfillment of the requirements for 



the Degree of Doctor of Philosophy in the Faculty of 



Pure Science, Columbia University 



