616 Journal of Applied Microscopy. 



intestine were entirely necrotic. After defervescence there may be almost 

 complete reparation with only a little connective tissue formation around the 

 blood vessels. Abscess of the lymph node or complete sclerosis may occur. 



In acute lobar pneumonia the tracheal lymph nodes were congested and 

 often hemorrhagic. The centers of the follicles were invaded by polymorphonu- 

 clear leucocytes, which appear early and are afterward destroyed by the cells of the 

 reticulum, which multiply rapidly and are markedly phagocytic. These cells in 

 turn undergo a granular degeneration, and are carried off by the lymphatics. 



In acute broncho-pneumonia the changes are similar. 



In diphtheria the cervical lymph nodes were examined. These were con- 

 gested and often contained abscesses due to secondary infection. In some nodes 

 was seen fragmentation of nuclei in the center of the follicles, with occasional 

 foci of necrosis. r. m. p. 



Labbe. Les ganglions lymphatiques dans In this article Labbe reviews his 

 les processus infectieux. La Presse Med- previous work and draws the follow- 

 icale. April 12, 1899. f 



ing conclusions in regard to the role 



of the lymph nodes in infectious processes. 



By its system of lymph sinuses the lymph node arrests the onward progress 

 of bacteria which have escaped the action of the leucocytes at the point of inoc- 

 ulation, and of the endothelial cells of the lymph vessels through which they 

 have passed. 



In the lymph node the bacteria are subject to a second phagocytic action, 

 that of the endothelial cells of the lymph sinuses. These cells also aid in 

 removing the excess of red blood globules and degenerated cells. 



Bacteria do not invade the lymphoid tissue unless the resistance of the 

 tissue has been diminished by an earlier action of toxin absorbed from the site 

 of inoculation. 



The lymph node not only retards the progress of bacteria, but also attenuates 

 their virulence. 



During infection the production of leucocytes by the follicles of the lymph 

 node is increased. 



These changes take place in both local and general infections. 



R. M, p. 



Bezancoo et Labbe. Sur la reaction des gang- Lymph nodes in the vicinity of car- 

 lions lymphatiques au voisinage des can- cinoma are often hypertrophied with- 

 cers. La Presse Medical, April 15, 1099. _ . j r r 



out any invasion by the growth. His- 

 tologically the follicles are very large, their germinative centers are highly 

 developed and rich in karyokinetic figures. r. m.- p. 



T, „ ,, ... , , T^ .. The writer reports a new growth in 



bngelken. Metastasinnde embryonale Drusen- ^ ° 



geschwulst der Nierengegend im Kinder- the kidney of a girl four years old, 

 Salter. Beitrage zur Path. Anat. und Allg. ^hj^h by direct extension involved the 

 Path. 26:320, 1899. ■' 



vena cava and the right auricle of the 



heart. There were many metastases in the liver and the peritoneum, and one 

 nodule in the left lung. Microscopically the new growth consisted of sarcoma-like 

 cells, connective tissue, blood vessels, smooth muscle fibers, and gland-like 



