The lymphatics of the lower extremities having now reached the trunk of the body, and passed under Pou-part's ligament, appear upon the sides of the ossa pubis, near the pelvis. Some pass up with the iliac artery upon the brim of the pelvis; and others dip into the cavity of the pelvis, and join the internal iliac artery near the sciatic notch. At this place they are joined by the lymphatics from the contents of the pelvis. Besides those which sink into the pelvis, on the inside of the external iliac, others keep on the outside of that ar-tery upon the psoas muscle: of these a part goes up to the loins, and passing under the aorta in different branches, from the left side to the right, joins the thoracic duct. Another part passes under the iliac arteries, and appears upon the os sacrum, making a beautiful net work, joining the lymphatics of the right side, and passing under the iliac artery, to form the net work upon the upper part of the right psoas muscle. The lymphatic vessels of the right side, joined by some from the left, having reached the right lumbar region, appear there in the form of a plexus of large vessels, and pass through several glands. At this part, they receive likewise large branches under the aorta, from the plexus on the left side of the loins; and having at last got up as high as the second lumbar vertebra, they all join, and form a single trunk called the thoracic duct: at this part they are joined by the lacteals. See Lactea vasa. .

Into the thoracic duct the lymph from the other abdominal viscera enters. This is brought by a number of vessels, a plexus of which may be traced from each kidney, lying principally behind the emulgent artery, and opening into large lymphatic vessels near the aorta: these the lymphatics of the glandulae renales generally accompany.

The lymphatic vessels of the spleen pass from the concave side of that viscus, along with the splenic artery in the sinuosity of the pancreas, by the lymphatic vessels of which they probably are joined.

To the stomach belong two sets of lymphatics, the one running upon its lesser, and the other upon its greater, curvature. The former accompanies the coronary artery, and passes through some lymphatic glands which lie by its side. The other set passes from the great curvature of the stomach, through some lymphatic glands that lie close to the arteria gastrica dextra. Descending by the pylorus, it meets the plexus that accompanied the coronary artery, and near the lesser curvature of the duodenum forms a considerable net work. Into this not only the lymphatics from the spleen enter, but likewise those from the gall bladder, together with those of the liver, which are very numerous both in its convex and on its concave side. Several branches proceed from this net work, some running under the duodenum, and others over it; which all open into the thoracic duct.

The lymphatics of the liver, the spleen, and the kidneys, are generally in two sets; one of which lies upon the surface of the organ, and the other accompanies the large blood vessels in its centre. In the liver, these two sets have been found to communicate with each other; so that, by injecting mercury into the lymphatic vessels which lie upon its convex surface, Mr. Hewson hath filled those which accompany the pori bilarii and vena portae in its centre. Most of the lymphatic vessels which lie upon the convex surface of the liver, run to-wards its falciform ligament, and pass down by the side of the vena cava; but some run towards the. right ligament of the liver, where they pass down upon the dia-phragm to reach the thoracic duct. The lymphatics on the concave surface run towards the porta, where they join those which come from the centre of the liver, along with its large blood vessels. The lymphatic ves-sels of the stomach enter with others into the thoracic duct. All the lymphatics of the viscera, with their different plexuses, are beautifully figured by Mascagni.

The lymphatics of the lungs are in two sets, One set passes on the posterior part of each lobe by its root into the thoracic duct, near the middle of the thorax; the other from the fore part of each lobe rises towards the jugular and subclavian veins."some of the lymphatics, on the posterior part of the left lobe, creep under the aorta to the thoracic duct. Those from the anterior part of the left lobe proceed to the angle between the jugular and subclavian vein of the same side, joining the thoracic duct at its termination; while those from the fore part of the right lobe do not communicate with the thoracic duct, but pass into the angle between the: jugular and the right subclavian vein.

By the side of each internal jugular vein is a large lymphatic vessel, the trunk of those of one side of the head and neck. Smaller lymphatics are seen: the branches of the external carotid. From variou-circumstances, it is highly probable that there are lymphatic vessels on the external parts of the head; and. though none have been discovered, on the brain also. The small lymphatics which accompany the branches of the external carotid artery unite upon the neck, and form a large trunk, which accompanies the internal ju-gularvein, passing through some lymphatic glands,near the termination of this trunk, in the angles between the jugular and subclavian veins. The glandula thyroidaea has many lymphatic vessels, which can sometimes be inflated by blowing air into the cells of the gland: these vessels pass on each side of the trachea, one part going into the angle of the right subclavian and jugular, and the other joining the thoracic duct upon the left side.

Like the leg, each arm hath two sets of lymphatic, vessels-; one immediately under the integuments, belonging to the skin and the cellular membrane, connecting it to the muscles; the other accompanying the large arteries, from the parts deeper seated.

The lymphatic vessels, discovered and delineated, are in general only to be considered as the trunks, since every part of the body has probably vessels of this kind; for wheresoever variolous matteris inserted, the lymphatic vessels carry it into the body, as is shown by its inflaming the conglobate glands through which these vessels pass.