VI PEEFACE. 



one work, the knowledge possessed, at the present day, on 

 questions relating to the preservation and restoration of the 

 health of our domestic animals. 



The laws of health require to be known before ill-health 

 or disease can be understood, and agriculturists require to 

 know more of disease with a view to prevention, than with 

 a view to active medical treatment. It is this circumstance 

 which will induce the author to treat fully of the causes of 

 disease their method of action the phenomena they induce 

 and the methods of checking the latter. In this Treatise 

 the functions of animals are considered in their healthy con- 

 dition, with the circumstances capable of disturbing them, 

 and a general history of such disturbances. Thus what has 

 to be said of disease illustrates and demonstrates all that 

 has to be said regarding health. 



With this programme clearly before him, the author has 

 aimed at limiting his subject in the manner he deems most 

 desirable for the class of readers for whom this Treatise is 

 intended, viz., the well-educated stockowner no less than the 

 veterinary surgeon. 



