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PUBLISHERS' PREFACE. 



The fourth English edition of Professor Stirling's translation of 

 Landois' "Physiology," published in 1891, has been out of print for 

 some years. Since the date of publication of this English edition, 

 the work has passed through three more large editions in Germany. 

 On each occasion Professor Landois still further enhanced its merits 

 by incorporating all those results of physiological investigation which 

 in his judgment would have a permanent value not only for advanced 

 students but for practitioners of medicine as well; and hence there is 

 probably no work which so thoroughly and satisfactorily represents 

 the existing state of physiological science and its relations to pathology 

 and clinical medicine, as that of Professor Landois. 



For the reason that pathological processes are but variations of 

 physiological processes in one direction or another, there is appended 

 to almost every section those variations which are regarded by the 

 clinician as pathological. In this way the student is made to realize 

 not only the close interdependence of physiology and pathology, but 

 the necessity for a thorough and accurate knowledge of the former for 

 an intelligent comprehension of the latter. The work of Landois thus 

 becomes a guide which conducts the student from the physiological 

 laboratory to the work of the clinician. That it has been successful 

 in this respect, and that it meets the needs of students and practitioners 

 of medicine, is the only explanation that can be offered for the ex- 

 traordinary fact that it has passed through ten large editions in Ger- 

 many in twenty years, and, in additi'on, has been translated into French, 

 Russian, English, Italian, and Spanish. 



The continued success of each successive edition in Germany and 

 the frequent requests for an English edition have convinced the pub- 

 lishers that a new translation would be acceptable to students and 

 practitioners of the present day and decided them to issue the work 

 in its present form. The translation was intrusted to Dr. A. A. Eshner, 

 Professor of Clinical Medicine in the Philadelphia Polyclinic. In this 

 he was ably assisted by Drs. Bernard Kphn, E. A. Shumway, Maurice 

 Ostheimer, R. Max Goepp, Brooke M. Anspach, C. A. Fife, D. J. 

 McCarthy, and W. B. Stanton. The text has been revised and edited 

 by Dr. Albert P. Brubaker, Professor of Physiology in the Jefferson 

 Medical College. 



The publishers wish to express their appreciation of the conscientious 

 care which has been given by each and all to the preparation of this 

 edition. 



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