1115 
DR. H. yATNEY ON THE MINUTE ANATOMY OF THE THYMUS, 
Fig. 65. .Camera lucida, obj. 7, X 450, oc. III., obj. 9. 
From thymus of Calf one year old. In the upper part of the figure a 
network is seen, containing one granular cell. 
Below, is a large granular mass in continuity with a vessel-like formation. 
The whole is attached to the cells forming the network. 
Fig. 66. Camera lucida, obj. 7, X 450, oc., III., obj. 9. 
Section of thymus of Calf one year old, hardened in chloride of gold and 
chromic acid. 
Two granular cells, and a small cell surrounded by a thick border; the 
whole forming a commencing .concentric corpuscle. 
Fig. 67. Camera lucida, obj. 7, X 450, oc. III., obj. 9. 
From thymus of Calf one year old. 
Multinuclear protoplasm surrounding a vacuole, which contains a granular 
cell. The whole forms an early stage in the formation of a concentric 
corpuscle. 
Fig. 68. Camera lucida, obj. 7, X 450, oc. III., obj. 9. 
From thymus of Calf twelve days old. In the lower part of the figure a 
commencing concentric corpuscle is .seen, composed of epithelioid and granular 
cells. The central granular cell (gr) is surrounded by a vacuole. 
v. Blood vessel, to which is attached a network of connective-tissue- 
corpuscles and granular cells. 
f A bundle of newly formed fibrous-tissue. 
Fig. 69. Camera lucida, obj. 7, X 450, oc. III., obj. 8. 
From thymus of Calf twelve days old. Shaken specimen. At the upper 
part of the figure a small concentric corpuscle is seen ; the centre is formed 
by a granular cell. 
v. Blood-vessel. 
The neighbouring connective-tissue-corpuscles are very large. 
f Newly formed fibrous-tissue, attached to the wall of the vessel, in the 
lower part of the figure. 
th. Coarse connective-tissue threads, with imbedded nuclei 
gr. Granular cells. 
Fig. 70. Oc. III., obj. 11, immersion X 850. 
A thymic corpuscle treated by f per cent, saline solution. 
Fig. 71. Camera lucida, obj, 8, X 600, oc. III., obj. 9. 
cbc. The outlines of the colourless blood corpuscles, from one of the 
thymic veins of an Ox twenty-two months old. 
The . The outline of the thymic corpuscles, from one of the lymphatics of 
the thymus of the same animal. 
B, C, D, E, not drawn to scale. 
B. Large cell, with processes containing fine granules, but no haemoglobin. 
C, D, E. Yarious cells containing larger or smaller masses of haemoglobin. 
