THE EESPIEATOEY TRACT. 727 



is the uniform infiltration ' of the interstitial connective tissue 

 with inflammatory corpuscles, together with the plugging of 

 the calibers of the alveoli, as in croupous pneumonia. The 

 blood-vessels are completely destroyed, and in more advanced 

 stages the walls of the alveoli disappear entirely. The breaking 

 apart of the inflammatory corpuscles leads to the formation of 

 pus. In purulent pneumonia the whole invaded portion assumes 

 a grayish-yellow color, while in circumscribed suppuration the 

 forming abscess is surrounded by intensely hyperaemic lung- 

 tissue. 



FIG. 326. HYPERTROPHY AND EMPHYSEMA OF THE LUNG. 



F, broadened frame of alveolus ; E, emphysematous alveolus ; If, detached alveolar epi- 

 thelium ; T, colloid corpuscle, probably sprung from alveolar epithelia ; P, pulmonary artery, 

 with a considerably thickened adventitial coat. Magnified 500 diameters. 



SYPHILITIC HEPATITIS AND SYPHILITIC PNEUMONIA. 

 BY J. H. RIPLEY, M. D.* 



Mrs. B., the mother of eight children only one living, a, boy of six, who 

 has syphilitic incisor teeth has had three successive miscarriages at the 

 eighth month of utero-gestation. The first two of these infants were still- 

 born ; the third, the subject of my examination, lived about fifteen minutes, 

 and even cried aloud. 



The post-mortem examination included only the thoracic and abdominal 

 organs, and was made in great haste. The lungs were large, of a dark grayish 



Printed from the author's manuscript. 



