iv Preface to German Edition. 



nullum librum legit, ex quo noii excerpserit." I therefore ac- 

 knowledge at the outset and at various places in the text, that I 

 have freely employed in the preparation of the following text- 

 book the works of Ribbert, Perls, Krehl, Durk, Samuel, Thoma, 

 Birsch-Hirschfeld, Johne, Uhle and Wagner, as it is in fact prac- 

 tically impossible to write an authoritative work on general 

 pathology without dependence upon other authors. 



The scientific development of veterinary medicine depends 

 primarily upon the same principles which obtain in human med- 

 icine. The propositions and methods of research which were 

 originally employed in the study of human pathology, are for us, 

 too, fundamentals for the appreciation and investigation of the 

 nature of the animal diseases. Every new advance in human 

 medicine in the fields of anatomy, physiology, the use of the micro- 

 scope, technique of clinical study, surgical and therapeutic meth- 

 ods, bacteriological and practical hygiene, has been of advantage 

 to comparative medicine, and, mutatis mutandis, has found an 

 application in veterinary practice, and has pointed out the way 

 for advanced work in our own branch. There has been much as- 

 sistance afforded, too, in the fact that many of the discoveries 

 of value to human medicine have been made from experimental 

 studies upon animals, and the principles of general pathology par- 

 ticularly have been fundamentally proven by comparative study 

 of the anatomy and physiology of animals; both branches of med- 

 icine, therefore, drawing from the same sources and having a 

 common field of work. 



Apart from these considerations, however, the representatives 

 of veterinary medicine have, by their independent achievements, 

 built up the pillars and walls of their own scientific temple, wdth 

 such multiplicity of specialized purposes and requirements that 

 the method and practice of veterinars' medical instruction have 

 come to have a peculiar character of their own. Consideration 

 of these requirements is attempted in this volume. 



It is well known to every teacher who is required to act as 

 an examiner, how difficult it often is for the candidates in an 

 examination to express what they well know and how, no matter 

 how clearly the questions may be presented, or what statements 

 are made suggesting a proper answer, this or that really capable 

 student finds himself forced to struggle with words and is handi- 

 capped in expressing his ideas. In order to lessen these diffi- 

 culties for students, I have endeavored to frame mv definitions 



