PREFACE TO THE TENTH EDITION. 



In spite of the short interval that has elapsed between the appear- 

 ance of the ninth and that of this new edition all sections of the book 

 have been subjected to extensive revision, with the inclusion of the 

 results of the most recent investigations. The number of illustrations 

 has been increased and some have been replaced by better ones. 



Since the book has been placed in the hands of students and phy- 

 sicians in ten large editions, as well as in several English editions, a 

 Russian translation in a second edition, an Italian, a French, and a 

 Spanish translation, I have become more firmly established in the 

 conviction that the plan according to which I have labored, both as 

 author of this book and as teacher, is the correct one. Physiology is 

 the foundation of internal medicine, and it should, therefore, be so 

 taught that the physician can continue to build upon it and find sup- 

 port in it. This has been my endeavor ; in this sense the book has been 

 revised uniformly throughout in this edition. 



L. LANDOIS. 



GREIFSWALD. 



VI 



