PREFACE. 



We are particularly indebted for valuable assistance 

 received from Dr. Stanley P. Black, Pathologist at 

 Mercy Hospital. Dr. F. X. Walls, and Dr. E.G. Conklin 

 of Northwestern University, Dr. A. C. Eychleshymer 

 of Chicago University, and Dr Adolph Gehrmann of 

 College of Physicians and Surgeons, Chicago, have also 

 rendered us much assistance. 



Among the books consulted, we have drawn more 

 particularly for Part I from Lee's Vade Mecum, Stir- 

 ling's Histology, Schafer's Histology, Von Kahlden's 

 Pathological Histology, and Lehrbuch der Histologie 

 und Mikroskopischen Techink. (Bohm und Davidoff), 

 and for Part II from Migula, Sternberg, Schenk, Novy, 

 and Praenkel. Suggestions and criticisms from those 

 interested in the material here presented, will be greatly 

 appreciated. 



September, 1895. 



