An added force is given to all these illustrations of the universal belief that transferred blood has a vivifying power, by the conclusions of modern medical science, concerning the possible benefits of blood-transfusion.[233] On this point, one of the foremost living authorities in this department of practice, Dr. Roussel, of Geneva, says: “The great vitality of the blood of a vigorous and healthy man has the power of improving the quality of the patient’s blood, and can restore activity to the centres of nervous force, and the organs of digestion. _It would seem that health itself can be transfused with the blood of a healthy man_”;[234] death itself being purged out of the veins by inflowing life. And in view of the possibilities of new life to a dying one, through new blood from one full of life, this writer insists, that “every adult and healthy man and woman should be ready to offer an _arm_, as the natural and mysteriously inexhaustible source of the wonder-working elixir.”[235] Blood-giving can be life-giving. The measure of one’s love may, indeed, in _such_ a case, be tested by the measure of his yielded blood.[236] Roussel says, that blood transfusion was practised by the Egyptians, the Hebrews, and the Syrians, in ancient times;[237] and he cites the legend, that before Naaman came to Elisha to be healed of his leprosy,[238] his physicians, in their effort at his cure, took the blood from his veins, and replaced it with other blood. Whatever basis of truth there may be in this legend, it clearly gained its currency through the prevailing conviction that new blood is new life. There certainly is ample evidence that baths of human blood were anciently prescribed as a cure for the death-representing leprosy; as if in recognition of this root idea of the re-vivifying power of transferred blood. Pliny, writing eighteen centuries ago, concerning leprosy, or elephantiasis, says[239]: “This was the peculiar disease of Egypt; and when it fell upon princes, woe to the people; for, in the bathing chambers, tubs were prepared, with human blood, for the cure of it.” Nor was this mode of life-seeking confined to the Egyptians. It is said that the Emperor Constantine was restrained from it, only in consequence of a vision from heaven.[240] In the early English romance of Amys and Amylion, one of these knightly brothers-in-arms consents, with his wife’s full approbation, to yield the lives of his two infant children, in order to supply their blood for a bath, for the curing of his brother friend’s leprosy.[241] In this instance, the leprosy is cured, and the children’s lives are miraculously restored to them; as if in proof of the divine approbation of the loving sacrifice.