TKANSLATOE'S PBEFACE. 



The hearty reception accorded by the medical students and practi- 

 tioners of America to Professor Eiggs's translations of the earlier German 

 editions makes it unnecessary for the editor of the present translation to 

 introduce the work to Professor Edinger's circle of American readers. 



The additions which have been made to the original since the last 

 English translation increases the range of its usefulness. Originally ad- 

 dressed particularly to the needs of the medical profession, it no^f contains 

 matter which is practically indispensable to the general student of hfe^ology 

 or of physiological psychology in the biological departments of our universi- 

 ties. 



In a few instances passages, in Part II of the original, which appear in 

 fine print and serve to amplify or to further explain certain statements of 

 the text, have been condensed or omitted, justification for this being urged 

 in the somewhat different needs of the American readers of the work. The 

 "lectures" of the original have been presented as Chapters. This necessitates 

 an occasional departure from the diction of the original. 



The translators take this opportunity to acknowledge the efficient 

 assistance of Mr. J. C. Gordon, of the Wisconsin State University, in the 

 preparation of the manuscript. 



The fullness of the index prepared by Dr. Charles L. Mix, Instructor 

 in Neurology in the ISTorthwestern University i\Iedical School, adds much 

 to the value of the book, both in its use as a text-book and as a book for 

 reference. The translators express herewith their appreciation of the work 

 done by Dr. Mix in preparing the index, and also in making the final proof- 

 reading. 



WiNFiELD S. Hall. 

 Chicago, Novembek, 1898. 



(vii) 



