K- 



AUTHOR'S PREFACE 



IN overseeing the corrections incident to the publication 

 of the volume herewith presented, the author has been for- 

 tunate in having the assistance of Dr. Carl Schwarz, Docent 

 in Physiology in the University of Vienna, and of Dr. Adolf 

 Fuchs, Assistant in the Eoyal and Imperial Franz Joseph 

 Hospital. It is a pleasure to acknowledge here to both these 

 gentlemen the author's most cordial appreciation. Nor 

 can the author fail to express his obligations to Mr. F. 

 Lampe-Vischer, head of the F. C. Vogel Publishing Com- 

 pany of Leipzig, for the readiness of cooperation which he 

 invariably accorded, at every stage of the preparation and 

 publication of this work. 



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