Quasi nympha, (from Lympha 4805water).

Lymph is a pellucid, insipid, pure liquor in the human machine, and the purer parts of the serosity generally obtain this appellation. The gelatinous parts of this fluid were supposed to nourish all the solids, its finer aqueous parts to be circulated through the lymphatic vessels, and, by means of the valves and conglobate glands, again conveyed to the heart. These ideas are, however, now exploded; but, in the Boerhaavian school, we still hear of lymphatic arteries, which are properly those which will not admit the red globules. They have corresponding veins distinguished by the same appellation. The source of the lymph, which we find in the cavities, as the pericardium, the ventricles of the brain, etc. either in the healthy state, or when accumulated in dropsical swellings, is uncertain. Dr. Hunter has attributed it to exudation through the inorganic pores, as he found his injections, the bile, and other fluids, exude after death. This opinion is, however, untenable, from many views, but particularly the numerous and dense coats of the vessels; for it is not probable that the pores should be sufficiently large for this purpose, without danger of all the serosity escaping; or that, in each coat, the inorganized pores should so minutely correspond. It is, therefore, with much reason, supposed that the exudation which he found was in consequence of the relaxation occasioned by death, and that all the watery fluids are either exhaled from the open orifices of arteries, or separated by a simpler species of secretion. There is, we think, little doubt of the vessels in a state of health confining the fluids by their tonic power. Indeed, they seem to pass off in a state of halitus.