A TEXT-BOOK 



OF THE 



PRINCIPLES OF ANIMAL 

 HISTOLOGY 



BY 



ULRIC DAHLGREN, M.S. 



ASSISTANT PROFESSOR OF BIOLOGY IN PRINCETON UNIVERSITY 



AND 



WILLIAM A. KEPNER, A.B. 



ADJUNCT PROFESSOR OF BIOLOGY IN THE UNIVERSITY 

 OF VIRGINIA 



'S\ 



' 



I" 







THE MACMILLAN COMPANY 



1908 



All rights reserved 



