INTEODUCTION. 33 



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. 



PEVEE. 



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-colored, 

 mouth hot and dry. 



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

 time, the skin becomes more moist, the bowels and kidneys 

 act more freely ; the pulse becomes more full, although 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 symptomatic fever. 



Fever is called idiopathic^ when not accompanied by dis- 

 ease or accident. From the days of Galen to the present 

 time, of the many theories advanced ta explain its proximate 

 oau&o, none seem to satisfy the philosophical student, and 

 all belong to the unsolved problems in physiology. 



Diseased Secretion. — A good example of what is here 

 meant may be found in the discharges from the nose of 

 animals aifected with cold, influenza, and glanders. The 

 salivary gland may secrete too much fluid, as horses eatiiig 

 second crop clover. We call this salivation. 

 3 



