PLATE IX 



FIG. i. Section of the adrenal body of the rabbit (picro-carmin), x 20. Author's collection. 



This figure is from a section of the adrenal body taken under a magnification too low to 

 show the cells. It shows the fibrous capsule and the cortical and medullar substances. The 

 cortical substance has a radiated appearance, due to the arrangement of the cells in columns. 



FIG. 2. Section of the spleen of the cat, injected, X 125. Collection of Dr. A. W. Baird. 



This figure shows Malpighian bodies, which are gray. The spleenic veins and sinuses are 

 filled with a red injection. 



FIG. 3. Section of the spleen of the dog (hematoxylin-eosin), x 30. Author's collection. 



This figure shows Malpighian bodies embedded in the spleen-pulp. 



FIG. 4. Section of the thyroid of the dog (hematoxylin-eosin), x 125. Author's collection. 



This figure shows several alveoli lined with epithelial cells and filled with colloid substance. 

 The nuclei are distinct, but the magnification is too low to bring out the contour of the cells. 



FIG. 5. Section of the thymus of a human foetus (hematoxylin-eosin), x 20. Ewing. 



This section shows parts of several lobules, each surrounded by the connective tissue of the 

 trabeculae ; the cortex is more deeply stained than the medullary substance ; in the medullary 

 substance are sections of small bloodvessels and a few concentric corpuscles of Hassall, but 

 these are very indistinct on account of the low magnification. 



FIG. 6. Striated human muscle, unstained, x 125. Author's collection. 



This figure shows the structure of striated muscle ; the transverse striae are apparent 

 on close examination, especially in the fibres to the left, although the magnification is low. 



