32 MANUAL OF EQUINE MEDICINE. 



Lardaceous degeneration is especially liable to affect the 

 liver, spleen, kidneys, intestines, and lymphatic glands. 



Organs in which lardaceous degeneration is at all ad- 

 vanced are usually considerably increased in size, and their 

 absolute weight and specific gravity are also increased. 

 Their surface is smooth, and their capsule tense. Their 

 consistence is firm and elastic. On section they present a 

 peculiar homogeneous glistening transparent appearance, 

 somewhat resembling wax or glue. Owing to diminution 

 of the calibre of the blood-vessels, and to the pressure 

 exerted by the new material, they contain but little blood, 

 and hence are always pale on section. 



Calcareous Infiltration consists in the deposition of cal- 

 careous particles, generally between, but partly also within 

 the elements of the tissues. The particles are composed of 

 salts of calcium and magnesium. This form of infiltration 

 occurs either as the result of an excess of earthy salts in the 

 blood, as in osteomalacia or extensive caries, or as the result of 

 impaired nutrition of tissues, owing to which earthy matter 

 normally held in the blood in solution is deposited in them. 

 Of the latter arterial calcification will serve as an example. 



Pigmentary Infiltration. — Here pigmentary particles are 

 deposited in the tissue elements, just as fat or calcareous 

 particles are deposited in other degenerations. This form 

 of deposit has been noticed in the lungs of horses. 



FEVER. 



Fever is an abnormal condition of the system, character- 

 ized by undue elevation of temperature. The mean tem- 

 perature of the horse, taken in the mouth and rectum, is 

 estimated at 99° to 102° F. The average temperature of a 

 large number of records of blood-horses, under similar con- 

 ditions, taken by us in the morning, was 100*5° F. 



The external parts of the body in the healthy condition 



