PREFACE 



PHILIPP STOHR, whose Lehrbuch der Histologie is here presented with 

 many additions and changes, was born at Wiirzburg, June 13, 1849, and 

 died in his native city, November 4, 1911. It was his good fortune to 

 study under the most eminent of all histologists, Albert von Kolliker, 

 whose assistant he became in 1877, and whom he succeeded as Professor 

 of Histology and Embryology at Wiirzburg in 1902. During these years 

 he enriched anatomy with a whole series of important contributions, and 

 he continued his researches until the time of his death, dealing with the 

 relation of lymphocytes to epithelium, the degeneration of glands in the 

 vermiform process, the development of hairs, the nature of the cells of the 

 thymus, and many other subjects. But as stated by Professor Schultze 

 in a memorial address (Verh. phys.-med. Ges., Wiirzburg, 1912, vol. 42), 

 "Stohr's position as an anatomist doubtless depends upon his surpassing 

 gifts as a teacher." He considered that the instruction of young men in an 

 intricate science was worthy of his best efforts, and his time was freely 

 given to preparing demonstrations, and to writing and revising his Lehr- 

 buch der Histologie und der mikroskopischen Anatomic des Menschen. 



The first edition of the Lehrbuch appeared in 1887, and the fifteenth, 

 edited by Schultze on the basis of memoranda which Stb'hr had prepared, 

 was published in 1912. Meanwhile the volume nearly doubled in size. 

 It has been translated into many languages, including the Japanese, and 

 the late editions have been issued in very large numbers. As principal 

 characteristics of the book, there may be mentioned, first, its clear and 

 concise style, somewhat dogmatic because of the omission of essentially 

 all references to authorities. Since Stohr considered that adequate refer- 

 ences would be impossible in a book of small size, he omitted them alto- 

 gether. Second, the almost entire absence of borrowed illustrations. As 

 Schultze remarks, Stohr possessed unusual artistic talent, and many of 

 the excellent figures were drawn by Stohr himself. Third, the full direc- 

 tions for the preparation of every specimen illustrated. In addition to 

 these special characteristics, the book has the advantages of being essen- 

 tially a resum6 of Kolliker's exhaustive Gewebelehre, adapted to the use of 

 students. 



The first American edition of Stohr's Histology was edited by Dr. 

 Alfred Schaper, at that time Demonstrator of Histology and Embryology 



