DISEASES OF SHEEP. 19 



ledge of tliis fact is of the greatest importance, inasmuch 

 as by its means we are enabled to detect a great many in- 

 flammations, especially those of the internal parts of the 

 body. It very often happens that such disturbances are 

 the only and most reliable indications or signs of the pre- 

 valence of inflammation. "Without such a disturbance, the 

 detection of many kinds of inflammation would be very 

 difiicult or impossible during the life of the animal; for 

 example, inflammation of the lungs is not perceptible to 

 the eye, because we are unable to see the principal marks 

 of inflammation, such as redness, swelling, etc., but we are 

 able to perceive a difiicult, increased and short respiration, 

 frequent and painful coughing, hot breath, etc. ; these are 

 conspicuous deviations and disturbances of the natural 

 functions of the lungs, and furnish the most important in- 

 dications of the prevailing inflammation . of the same. 

 These disturbances alone are, however, said to be not sufii- 

 cient to prove the truth of the assertion that an inflamma- 

 tion of the lungs exists, because other indications, such as 

 redness, swelling, etc., are not sufficiently demonstrated. 

 Such doubts are nevertheless entirely removed by experi- 

 ence. We find, for instance, whenever a carcass is dissected 

 and infiammation of the lun^s proved,' that the before- 

 mentioned disturbances of the functions of the lungs have 

 always occurred during the life of the animal. We must 

 therefore presume that such an inflammation exists when- 

 ever difiiculties in the respiration, together with other indi- 

 cations, occur. In some of the infiamed parts the disturb- 

 ances of the natural functions are more conspicuous than 

 in others, according to the place, the extent and the degree 

 of such inflammation, and also according to the nature and 

 importance of the natural functions of such afiected parts. 

 Inflammation of the brain produces the most vehement 

 symptoms, the brain being the most delicate part, perform- 



