PLATE III.

FIGS. 1 and 2. The structure of capillaries and minute blood. vessels in fibrous and serous textures; showing the absence of cellorganisms in the coats of the vessels of these textures. (p. 32.)

FIGS. 3, 4, and 5. The structure of capillaries, in the corpuscular secreting textures;-the blood channel is copiously bounded by cellorganisms several ranks deep. FIG. 3, a white granulation in the plexus choroides. FIG. 4, an intestinal villus. FIG. 5, a mucous follicle in the tongue of the Frog. (p. 32.)

FIG. 6. The structure of a minute blood-vessel in the human ovum, to which the explanation, fig. 5, plate 1, and the text, pp. 43, et seq., applies.

FIGS. 7 and 8. The natural structure of a capillary vessel in the tunica conjunctiva of the eye; and the change experienced during inflammation. FIG. 7. The vessel simply fibrous in its natural or healthy state. FIG. 8. Its calibre enlarged, and its coats thickly studded with cell-organisms during inflammation. (Vide case, p. 66.)

FIG. 9. A fibrous capillary, becoming clothed with cell-organisms; showing the elements of a retrograde growth. Were this vessel deflected in the middle, and the two extremities brought together as represented in FIG. 4, it would exhibit, not only the essential characteristics, but the form of a villus, (FIG. 4,) or of a granulation. (FIG. 3. See also p. 139, &c.) The normal elements of a fibrous capillary (FIGS. 1 and 2) becoming more and more interrupted by cell-organisms, is a phenomenon common to inflammation and scrofulous disease-preceding all those forms of disease which in morbid anatomy we recognize as granulations, tubercles, exudations, falsemembranes, hepatization, and ulceration, (See pp. 285 to 288.)

FIG. 10. CELLS, more highly magnified.