LYMPHATIC GLANDS. 249 



another vessel which lies over it. This being general, an ir- 

 regular surface is produced, so that it looks like a number of 

 small globules or very small pins' heads (vide Plate VI, fig. 1), 

 similar to what we observe in the epididymis when injected 

 with mercury ; and that this is really the case I am convinced, 

 from what I have observed on the examination of other lympha- 

 tic glands, when the vessels have been less convoluted, and 

 where the vascular texture has been more evident ; for in some 

 we can distinctly trace the continuity of vessels through the 

 glands, especially in the more simple ones. 



SECT. 11. Plate VI, fig. 2, exhibits a lymphatic vessel A, 

 forming three lymphatic glands : the first at B, is a subdivision 

 of the trunk A into about nine or ten branches, which are 

 convoluted, and form a gland. These unite again and form 

 the trunk at c, which ascending about three inches, divides 

 into about six branches running parallel to each other, and then 

 form a lymphatic gland at D, not larger than the trunk of the 

 vessel, which is the most simple I have ever seen ; the branches 

 are again united to form the trunk E ; this vessel next ascends 

 about three inches farther, and divides into two branches F and 

 G ; the branch G is continued on where it is joined with other 

 lymphatic vessels. The branch F is again divided into four 

 vessels, that are subdivided to form the third gland at H, evi- 

 dently composed of small convoluted lymphatic vessels ; these 

 vessels are again united and form the large lymphatic vessel 

 at i, which passes on to communicate with some other lymphatic 

 vessels not expressed in this Plate. All the objects in the 

 Plate are smaller than the natural size. 



SECT. 12. This circumstance of the lymphatic glands 

 being formed of convoluted lymphatic vessels is demonstrable 

 not only in this preparation, but also in many of the larger 

 and complete glands, particularly in Plate VI, figs. 3 and 4 ; 

 and though we have not so clear a demonstration that every 

 lymphatic gland is a convolution of lymphatic vessels, or that 

 some glands may not have large cells, yet we have this useful 

 fact, that a lymphatic gland is not always or necessarily com- 

 posed of cells, and as we can prove that some, nay, many 

 glands are only convoluted lymphatic vessels, and as the cellular 

 structure in any is rather doubtful, it is probable that all lym- 

 phatic glands are formed of convoluted lymphatic vessels, and 



