PREFACE. vii 



The editor gratefully acknowledges the many kindnesses shown by a number of 

 his associates. Dr. William G. Spiller generously placed at his disposal a large 

 collection of microscopical preparations of the central nervous system, from which 

 drawings of selected sections were made. To Dr. George Fetterolf the editor is 

 indebted for valuable assistance in preparing for and seeing through the press the 

 section on the peripheral nervous system. The collaboration of Dr. Edward A. 

 Shumway very materially facilitated the preparation of the description of the eye, 

 which received only the editor's revision. Likewise, Dr. Ralph Butler, by placing 

 in the editor's hands a painstaking review of the more recent literature on the ear 

 and preliminary account of that organ, greatly lightened the labor of writing the text. 

 Further, Dr. Butler supplied the microscopical preparations from which several of 

 the drawings were made. In addition to assuming the preparation of the index — a no 

 insignificant undertaking in a work of this character — Dr. Ewing Taylor gave valu- 

 able assistance in the final revision of the first hundred pages of the book. The 

 editor is indebted to Dr. W. H. F. Addison for repeated favors in preparing special 

 microscopical specimens. Dr. T. Turner Thomas kindly assisted in locating cross- 

 references. This opportunity is taken to express full appreciation and thanks to the 

 various authors and publishers, who so kindly have given permission to use illus 

 trations which have appeared elsewhere. 



Very earnest consideration of the question of nomenclature led to the conclusion, 

 that the retention, for the most part, of the terms in use by English-speaking 

 anatomists and surgeons would best contribute to the usefulness of the book. While 

 these names, therefore, have been retained as the primary terminology, those 

 adopted by the Basle Congress have been included, the BNA synonyms appear- 

 ing in the special type reserved for that purpose. The constant aim of the editor 

 has been to use the simplest anatomical terminology and preference has always 

 been given to the anglicized names, rather than to the more formal designations. 

 Although in many cases the modifications suggested by the new terminology have 

 been followed with advantage, consistent use of the Basle nomenclature seems less in 

 accord with the conceded directness of English scientific literature than the enthusi- 

 astic advocates of such adoption have demonstrated. 



The editor desires to express his appreciation of the generous support given him 

 by -the publishers and of the unstinted facilities placed by them at his disposal 

 throughout the preparation of the work. 



University of Pennsylvania, 

 September, 1907. 



