500 



Pneumonia 



culture (about 6 c.c.) was injected into the bronchus. The 

 syringe was then removed, the piston withdrawn, and the 

 syringe again attached to the pipet. By the injection of 

 air the culture was driven deeper into the bronchi. The tube 

 was then clamped and withdrawn and the animal released. 

 By these means experimental pneumonia, with the typical 



Fig. 162. Lung of a child, showing the appearance of the organ in 

 the stage of red hepatization of croupous pneumonia. The pneu- 

 monia has been preceded by chronic pleuritis, which accounts for the 

 thickened fibrous trabeculae extending into the tissue, and which may 

 have had something to do with the peculiarly prominent appearance 

 of the bronchioles throughout the lung. 



consolidation and lobar distribution, was produced in 42 

 successive cases. The course of the inflammatory disturb- 

 ance thus produced was rapid, and in one case nearly com- 

 plete consolidation had occurred in seven hours. 



