INTRODUCTION. 11 



disease, and known as the asthenic, requiring a treatment 

 opposite to the above variety, namely, iron, gentian, etc., 

 (which see,) to add to the strength of the animal, and 

 quality of the blood. An improved diet, and in greater 

 quantity, will, in many cases of depression, not only cure 

 the disease, but remove the cause also. 



FEVER. 



There are four stages observed in fever : — 



(1.) Weakness, loss of appetite, and low spirits. 



(2.) A shiver, or chill, uneasiness, flanks move quick 

 and short, nostrils more or less distended, one leg or ear 

 hot, and the other cold. 



(3.) After a time the coldness is succeeded by great 

 heat and thirst, costiveness, urine scanty and high-co- 

 lored, mouth hot and dry. 



(4.) When the fever has lasted for a longer or shorter 

 time, the skin becomes more moist, the bowels and kid- 

 neys act more freely; the pulse becomes more full, al- 

 though not less frequent, and the mouth more moist. 



When fever is accompanied with disease of the lungs, 

 liver, or other organ of the body, or after an accident of 

 any severity, it is then called spnptomatic fever. 



Fever is called idiopathic, when not accompanied by 

 disease or accident. From the days of Galen to the pre- 

 sent time, many theories have been advanced to explain 

 its proximate cause, but none seems to satisfy the philo- 

 sophical student, and it still belongs to the unsolved prob- 

 lems in physiology. 



Diseased Secretion. — A good example of what is here 

 meant may be found in the discharges from the nose of 

 animals affected with cold, influenza, and glanders. The 



