178 



PRACTICAL MICROSCOPY. 



5. The subdivision of the follicles into an outer, deeply-stained! 

 cortex, which completely surrounds a light centre, the medulla. 



6. The larger lymph-spaces and arteries of the capsular and 

 trabecular tissue. 



FIG, 117. SECTION OP A PORTION OF THE THYMUS BODY, FROM A CHILD, SIXTEEN DAYS AFTER 



BIRTH. X 60. 



A, A. Capsule which divides the organ into lobes. Portions of six lobes are visible in the section. 



B, B. Lymph-spaces. 



C, C. Trabeculae dividing the lobes into imperfect lobules. 



D, D. Subdivisions of the last into follicles. 



E, E. Central light portion of the lobules. 



(H.) 



7. The cortex of the follicles. (a) The numerous deeply- 

 stained lymph-corpuscles, (b) The network of the adenoid 

 tissue. (This will be greatly obscured by the lymphoid cells.) (c) 

 The blood capillaries. Only recognized by the contained cor- 

 puscles, (d) Minute trabeculae of connective tissue projected from 

 the capsule. 



8. The medulla of the follicles, (a) The sparsity of lymph- 

 corpuscles as compared with the cortical portions, (b) Large 



