Symptoms of Diseases. 77 



ruminants also, the second mastication of the food is among 

 the first of the vital processes to become disturbed in disease. 

 When a cow or an ox " loses the cud/' as it is called by herd- 

 men, that is, ceases to ruminate without apparent cause, 

 there is sure to be a feeling of sickness about the animal 

 which is thus interfering with one of its processes of diges- 

 tion. 



THE SIGNS OF DISEASES OF PAETICULAR ORGANS. 



There are various plans of classifying diseases, but the one 

 most practically useful is to arrange them with reference to 

 the main organs affected, because by following this plan they 

 are most easily recognized. Hence we have "Local Dis- 

 eases " that are principally located in one or another part of 

 the body, and " General Diseases,'^ which affect all of it. 

 But it must not be forgotten that local diseases, as they in- 

 crease in severity, generally involve the whole system more 

 or less ; and that general diseases may have local signs. 



By a careful study of what follows, the reader will be able 

 generally to determine with accuracy the seat of disease. 



Local diseases include 



1 . Diseases of the brain, spinal cord and nerves. 



2. Diseases of the breathing organs (windpipe and lungs). 



3. Diseases of the digestive organs (mouth, throat, stom- 

 ach, bowels). 



4. Diseases of the heart and blood-vessels. 



5. Diseases of the kidneys, bladder and sex organs. 



The prominent signs by which they can be recognized are as 

 follows : — 



1. Sig7is of Diseases of the Brain j Spinal Cord and Nerves. 



When there is unusual dullness and sleepiness, or their 

 opposite, wakefulness and wildness, brain disease may be sus- 



