318 DESCRIPTION OF PLATES. 



PLATE VIII. 



FIG. 1, Exhibits the Chest of a Still-born Child, opened to 

 show the Situation of the Thymus Gland. 



a, a, a, a, The skin, muscles, and ends of the ribs, the 

 sternum and cartilaginous part of the ribs being removed. 



b, b, b, by The edge of the diaphragm. 



c, Cj The right and left lung. 

 dj The pericardium. 



e, The heart. 



f t Part of the first bone of the sternum. 



9> 9> 9) The thymus gland. 



FIG. 2, Exhibits the Size and Figure of the Vesicles of the 

 Human Blood, as they appeared in the microscope when 

 viewed through a lens the ^ of an inch focus. The solid 

 central particle, as formerly described, is seen distinctly 

 in the centre of each vesicle (see Notes xcvi and en). 



FIG. 3, Represents the Size and Figure of the Particles (see 

 Note cxxii, p. 253) found in a Lymphatic Gland, taken 

 from the Human Body, as they appeared viewed by a 

 strong sun-light, through the same lens used in the former 

 experiments. 



FIG. 4, Represents a portion of a Lymphatic Gland from the 

 Human Subject greatly magnified, in which the cells of 

 the Lymphatic Gland are shown. 



