These Glands, as described by Dr. _Havers_ in his new Osteology, and as they discover themselves upon Dissection, are of two Kinds; some are small and thickly interspersed in the Membranes of the Joints, and with very few Exceptions of an equal Bigness, so as to render the Membrane perfectly Glandulous: In some Parts of the Membrane, in the Joints, and in the Furrows of the Bone, these Glands are so united as to form very remarkable and large conglomerate Glands. In some of the large Joints there is but one, as in the Hip Joint; in others, as in the Knee, four or five; they are of a red Colour, which is communicated from the blood Vessels; as to their Substance, soft and papillary, tho’ not tender and friable; they are in their Structure Conglomerate, consisting of divers Membranes, wove one within another, interspersed with small round Vesicles, which are not only contiguous, but adhere closely one to another, as the Membranes also do. By the Pores of these little Vesicles a mucilaginous Liquor is strained and secerned from the general Mass of the arterial Blood, and thence by the excretory Duct, with which all these Glands are furnished, is shed into the Interstices of all the Joints. SECT. 4. These Glands have a sufficient Number of blood Vessels, they dont come out of them in right Lines, but are observed to have many Convolutions, Windings, and Insertions; there seems to be a very particular Reason, from the Nature of the Liquor to be separated, for this Obliquity of the blood Vessels; for since that Liquor is to be viscid and mucilaginous, its Parts should proceed slowly, and not without Difficulty, through the glandulary Pores; and therefore the Vessels are contorted in the Manner we see, that the Motion of the Blood may be retarded, and more Time and Leizure given, both for the separating Particles of such a Nature, and for their Admission through the Pores of the Glands. SECT. 5. These Glands are of different Shapes, so as to fit the Furrows and Cavities where they are placed; some are long, others conical, broad at their Base and grow narrow towards the Top, so as to terminate in an Edge; some have a broad Base, and rise into a sort of Cone; some are like little Ridges; some like Fringe; some are broad and pretty flat. SECT. 6.