THE MICROSCOPE IN PATHOLOGY. 



243 



particles produce irritation and inflammatory phenomena, 

 accompanying which is a formation of true pigment from 

 the blood, whose deposit increases the darkness of tint in 



FIG. 198. 



FIG. 199. 



Anthracosis. Coal-dust inhaled into the alveolar septa of the lung. 1-3 JO. After 



KlXDFLEISCH. 



the lungs. Many morbid conditions, also, are attended 

 with formation of pigment. 



4. Fatty Infiltration. 



In this form of degeneration the fat is derived from the 

 food, and must be distinguished from 

 that metamorphosis called fatty degen- 

 eration. In fatty infiltration the fat 

 occurs in the cells as distinct drops of 

 oil (Fig. 199). 



The vitality and functions of the cells 

 are but little impaired by the accumu- 

 lation, which may be again reabsorbed, 

 while in fatty metamorphosis the ele- 

 ments are destroyed. Fatty infiltra- 

 tion of muscle is seen in the connective 

 tissue between the fasciculi, and not in 

 the muscular fibres themselves as in fatty degeneration. 



Fatty infiltrated liver- 

 cells. 1-300. After 

 RIXDFLEISCH. 



