114 STUDENTS HISTOLOGY 



cuts in a test-tube with alcohol for a few minutes, and with considerable vio- 

 lence, even sacrificing most of the sections. The agitation will dislodge the 

 lymph-cells, which otherwise would obscure the histology of the lymph- 

 follicles and cords. 



Stain deeply with hsematoxylin and eosin, and mount the thicker sections 

 in balsam, and those especially thin in glycerin. 



SECTION OF MESENTERIC LYMPHATIC NODE 



OBSERVE: ( Fi * s - 79 and 8 ) 



(L.) 



1. The fibrous capsule. (Note the elongated dots in the 



Fia. 79. VERTICAL SECTION OF A LYMPH-NODE FROM THE MESENTERY (X 60). 



A. Capsule of node. 



B. Lymph-spaces in the last. 



C. C. Trabeculse, L. S. (Longitudinal section.) 



D. D. Follicle, L. S. 



E. Obliquely sectioned trabecula. 



F. F. Large blood-vessels of the central portion of the node. 



G. Trabecula in T. S. (Transverse section.) 



H. Medullary cord in T. S. I 



I. Small and irregular cords of the center of the node. 

 J. Obliquely sectioned trabecula of the center of the node. 

 K, K, K. Lymph-paths. 



deeper parts of the capsule the nuclei of the smooth muscular 

 tissue, the thick- walled arteries, the lymph-spaces.) 



2. The trabeculae. (Trace these as they penetrate the organ, 

 and observe that they frequently end abruptly, on account of hav- 



