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 

 quamtity, vdll, in many cases of depression, not only mnr- 

 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, 

 mottth hot and dry. 



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

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

 act more freely ; the pulse becomes more fiill, 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 idia^pathiG, when not accompanied by dis- 

 ease or accident. From the days of Ga;len to the present 

 time, of the many theories advanced to explain its proximate 

 cause, 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 oi 

 animals affected with cold, influenza, and glanders. The 

 'salivary gland may secrete too much fluid, as horses eating 

 second csrop clover. We call this salivation. 



