1485. The physicians could do little or nothing for the people, and

seemed to take no account of the clinical history of the disease,--in this respect not unlike the Greek physicians who for four hundred years paid no attention to small-pox because they could find no description of it in the immortal works of Galen. The causes seemed to be uncleanliness, gluttony, immoderate drinking, and also severe inundations leaving decaying vegetation. Richmond's army has been considered a factor in the germination of the seeds of pestilent disorder which broke out soon after in the camps of Litchfield, and on the banks of the Severn. Sweating sickness was an inflammatory rheumatic fever, with great disorder of the nervous system, and was characterized by a profuse and injurious perspiration. In the English epidemic the brain, meninges, and the nerves were affected in a peculiar manner. The functions of the pneumogastric nerves were violently disordered in this disease, as was shown by the oppressed respiration and extreme anxiety, with nausea and vomiting,--symptoms to which modern physicians attach much importance. The stupor and profound lethargy show that there was an injury to the brain, to which, in all probability, was added a stagnation of black blood in the torpid veins. Probably decomposing blood gave rise to the offensive odor of the person. The function of the lungs was considerably impaired. The petechial fever in Italy in 1505 was a form of the sweating sickness. There were visitations in 1506 and in 1515 in England. In 1517 the disease lasted full six months and reached its greatest height about six weeks after its appearance, but was apparently limited to England. Meningeal symptoms were characteristic of the third visitation of the disease. In 1528 and 1529 there was a fourth visitation which resulted in the destruction of the French Army before Naples. It is said that in 1524 a petechial fever carried off 50,000 people in Milan, and possibly this was the same disease. In 1529 the disease had spread all over Europe, attended with great mortality. Germany, France, and Italy were visited equally. The famine in Germany, at this time, is described by authorities in a tone of deep sympathy. Swabia, Lorraine, Alsace, and provinces on the border of the lower Rhine, were frightfully affected, so that the disease reached the same heights there as in France. In England Henry VIII endeavored to avoid the epidemic by continual traveling, until at last he grew tired of so unsettled a life and determined to await his destiny at Tytynhangar. It was not the inhabitants of the land alone who were affected, but even fish and the fowls of the air sickened. According to Schiller, in the neighborhood of Freiburg in Breisgau, dead birds were found scattered under the trees with boils as large as peas under their wings,--indicating among them a disease, and this extended far beyond the southern districts of the Rhine. The disease was undoubtedly of a miasmatic infectious nature, as was proved by its rapid spread and the occasional absence of a history of contagion. It was particularly favored in its development by high temperature and humidity. The moral effect of the sweating sickness, similar to that of the black plague, was again to increase religious fanaticism and recreate the zeal of persecution. On the 15th of April, 1551, there was an outbreak of the fifth and last epidemic of sweating fever in Shrewsbury, on the Severn. With stinking mists it gradually spread all over England, and on the 9th of July it reached London. The mortality was very considerable. The English residents were particularly susceptible, foreigners being comparatively exempt. The epidemic terminated about the 30th of September. Since that time the sweating sickness has never reappeared in England; but in the beginning of the eighteenth century a disease very similar in symptoms and course broke out in Picardy, in Northern France. Toward the end of the century it spread to the South of France, and since that time has appeared epidemically, 195 distinct outbreaks having been observed in the course of one hundred and sixty-nine years, from 1618 to 1787. The disease has frequently appeared in Italy since 1755, and in various parts of Germany since 1801. In Belgium it has been observed in a few places within the present century (Rohe). Chronologic Table of the Principal Plagues.--In December, 1880, H. P. Potter, F.R.C.S., published a chronologic table of some of the principal plagues on record. In comments on his table, Potter says that he has doubtless included mention of many plagues which, although described under that name, are probably a dissimilar disease, writers having applied the terms pestilential and pestilent in a generic sense to diseases specifically different. It must also be remembered that, in some cases, death must have been due to famine, want, and privation, which are so frequently coexistent with pestilence. Following the idea of Hecker, the dancing manias have been included in this table. {table omitted} Small-pox.--From certain Chinese records it appears that small-pox, or a disease with similar symptoms, was known in China before the Christian era, and it was supposed to have been known at a very early period in India. Most likely it was introduced into Europe in the second century by a Roman army returning from Asia. Before the sixth century, the terrible century of the great plague, there seem to be no records of small-pox or other eruptive fevers. Neither Hippocrates, Galen, nor the Greek physicians who practiced at Rome, mention small-pox, although it is now believed that the Emperor Marcus Aurelius died of this disease. According to Dupony, the first document mentioning variola was in 570 A.D., by Marius, a scholar of Avenches, in Switzerland. ("Anno 570, morbus validus cum profluvio ventris, et variola, Italiam Galliamque valde affecit.") Ten years later Gregory of Tours describes an epidemic with all the symptoms of small-pox in the fifth reign of King Childebert (580); it started in the region of Auvergne, which was inundated by a great flood; he also describes a similar epidemic in Touraine in 582. Rhazes, or as the Arabs call him, Abu Beer Mohammed Ibn Zacariya Ar-Razi, in the latter part of the ninth century wrote a most celebrated work on small-pox and measles, which is the earliest accurate description of these diseases, although Rhazes himself mentions several writers who had previously described them, and who had formulated rules for their cure. He explained these diseases by the theory of fermentation, and recommended the cooling treatment. Adams remarks that although it is probable that small-pox existed for ages in Hindoostan and China, being completely isolated in those countries from the European world, it was not introduced into the West until the close of the seventh century. Imported into Egypt by the Arabians, it followed in the tracks of their conquests, and was in this way propagated over Europe. The foregoing statement disagrees with Dupony and others. It is well known that small-pox was prevalent in Europe before Rhazes's description of it, and after the Crusades it spread over Central and Western Europe, but did not extend to the northern countries until some years later. In 1507 the Spaniards introduced it into San Domingo, and in 1510 into Mexico, where it proved a more fatal scourge than the swords of Cortez and his followers, for according to Robertson it swept away in Mexico three millions and a half of people. In 1707 it appeared in Iceland, and carried off more than one-fourth of its inhabitants; in 1733, according to Collinson, it almost depopulated Greenland. The Samoyeds, Ostiaks, and other natives of Eastern Siberia, have frequently suffered from devastating epidemics. In Kamchatka the disease was introduced in 1767, and many villages were completely depopulated. According to Moore, at the beginning of the eighteenth century nearly one-fourteenth of the population died from small-pox in England, and at the end of the century the number of the victims had increased to one-tenth. In the last century the statement was made in England that one person in every three was badly pock-marked. The mortality of the disease at the latter half of the eighteenth century was about three to every thousand inhabitants annually. India has always been a fertile ground for the development of small-pox, and according to Rohe the mortality from small-pox has been exceedingly great for the past twenty years. From 1866 to 1869, 140,000 persons died in the Presidencies of Bombay and Calcutta, and several years later, from 1873 to 1876, 700,000 died from this disease. China, Japan, and the neighboring countries are frequently visited with small-pox, and nearly all the inhabitants of Corea are said to bear evidences of the disease. In the Marquesas Islands one-fourth of the inhabitants had fallen victims to the disease since 1863. It was first introduced into the Sandwich Islands in 1853, and it then carried off eight per cent of the natives. Australia, Tasmania, New Zealand, and the Fiji Archipelago have to the present day remained exempt from small-pox; although it has been carried to Australia in vessels, rigorous quarantine methods have promptly checked it. On the American continent it was believed that small-pox was unknown until the conquest of Mexico. It has been spread through various channels to nearly all the Indian tribes of both North and South America, and among these primitive people, unprotected by inoculation or vaccination, its ravages have been frightful. That small-pox a disease so general and so fatal at one time--has, through the ingenuity of man, in civilized communities at least, become almost extinct, is one of the greatest triumphs of medicine. Inoculation was known in Europe about 1700, and in 1717 the famous letter of Lady Montagu from Adrianople was issued, containing in part the following statements:-- "The small-pox, so fatal and so general amongst us, is here entirely harmless, by the invention of ingrafting, which is the term they give it. There is a set of old women who make it their business to perform the operation every autumn in the month of September, when the great heat is abated. People send to one another to know if any of their family has a mind to have the small-pox; they make parties for this purpose, and when they are met, the old woman comes with a nut-shell full of the matter of the best sort of small-pox, and asks what vein you please to have opened. She immediately rips open that you offer her with a large needle, and puts into the vein as much matter as can lie upon the head of her needle, and after that binds up the little wound with a hollow shell, and in this manner opens four or five veins." Soon after this letter Lady Montagu had her son inoculated in Turkey, and four years later her daughter was to be the first subject inoculated in England. She made rapid progress notwithstanding the opposition of the medical profession, and the ignorance and credulity of the public. The clergy vituperated her for the impiety of seeking to control the designs of Providence. Preaching in 1722, the Rev. Edward Massey, for example, affirmed that Job's distemper was confluent small-pox, and that he had been inoculated by the Devil. Lady Montagu, however, gained many supporters among the higher classes. In 1721 Mead was requested by the Prince of Wales to superintend the inoculation of some condemned criminals, the Prince intending afterward to continue the practice in his own family; the experiment was entirely successful, and the individuals on whom it was made afterward received their liberty (Adams). According to Rohe, inoculation was introduced into this country in 1721 by Dr. Zabdiel Boylston of Boston, who had his attention directed to the practice by Cotton Mather, the eminent divine. During 1721 and 1722 286 persons were inoculated by Boylston and others in Massachusetts, and six died. These fatal results rendered the practice unpopular, and at one time the inoculation hospital in Boston was closed by order of the Legislature. Toward the end of the century an inoculating hospital was again opened in that city. Early in the eighteenth century inoculation was extensively practiced by Dr. Adam Thomson of Maryland, who was instrumental in spreading a knowledge of the practice throughout the Middle States. Despite inoculation, as we have already seen, during the eighteenth century the mortality from small-pox increased. The disadvantage of inoculation was that the person inoculated was affected with a mild form of small-pox, which however, was contagious, and led to a virulent form in uninoculated persons. As universal inoculation was manifestly impracticable, any half-way measure was decidedly disadvantageous, and it was not until vaccination from cow-pox was instituted that the first decided check on the ravages of small-pox was made. Vaccination was almost solely due to the persistent efforts of Dr. Edward Jenner, a pupil of the celebrated John Hunter, born May 17, 1749. In his comments on the life of Edward Jenner, Adams, in "The Healing Art," has graphically described his first efforts to institute vaccination, as follows: "To the ravages of small-pox, and the possibility of finding some preventive Jenner had long given his attention. It is likely enough that his thoughts were inclined in this direction by the remembrance of the sufferings inflicted upon himself by the process of inoculation. Through six weeks that process lingered. He was bled, purged, and put on a low diet, until 'this barbarism of human veterinary practice' had reduced him to a skeleton. He was then exposed to the contagion of the small-pox. Happily, he had but a mild attack; yet the disease itself and the inoculating operations, were probably the causes of the excessive sensitiveness which afflicted him through life. "When Jenner was acting as a surgeon's articled pupil at Sudbury, a young countrywoman applied to him for advice. In her presence some chance allusion was made to the universal disease, on which she remarked: 'I shall never take it, for I have had the cow-pox.' The remark induced him to make inquiries; and he found that a pustular eruption, derived from infection, appeared on the hands of milkers, communicated from the teats of cows similarly disordered; this eruption was regarded as a safeguard against small-pox. The subject occupied his mind so much that he frequently mentioned it to John Hunter and the great surgeon occasionally alluded to it in his lectures, but never seems to have adopted Jenner's idea that it might suggest some efficacious substitute for inoculation. Jenner, however, continued his inquiries, and in 1780 he confided to his friend, Edward Gardner, his hope and prayer that it might be his work in life to extirpate smallpox by the mode of treatment now so familiar under the name of vaccination. "At the meetings of the Alveston and Radborough Medical Clubs, of both of which Jenner was a member, he so frequently enlarged upon his favorite theme, and so repeatedly insisted upon the value of cow-pox as a prophylactic, that he was denounced as a nuisance, and in a jest it was even proposed that if the orator further sinned, he should then and there be expelled. Nowhere could the prophet find a disciple and enforce the lesson upon the ignorant; like most benefactors of mankind he had to do his work unaided. Patiently and perseveringly he pushed forward his investigations. The aim he had in view was too great for ridicule to daunt, or indifference to discourage him. When he surveyed the mental and physical agony inflicted by the disease, and the thought occurred to him that he was on the point of finding a sure and certain remedy, his benevolent heart overflowed with unselfish gladness. No feeling of personal ambition, no hope or desire of fame, sullied the purity of his noble philanthropy. 'While the vaccine discovery was progressive,' he writes, 'the joy at the prospect before me of being the instrument destined to take away from the world one of its greatest calamities, blended with the fond hope of enjoying independence, and domestic peace and happiness, were often so excessive, that, in pursuing my favorite subject among the meadows, I have sometimes found myself in a kind of reverie. It is pleasant to recollect that those reflections always ended in devout acknowledgments to that Being from whom this and all other blessings flow.' At last an opportunity occurred of putting his theory to the test. On the 14th day of May, 1796,--the day marks an epoch in the Healing Art, and is not less worthy of being kept as a national thanksgiving than the day of Waterloo--the cow-pox matter or pus was taken from the hand of one Sarah Holmes, who had been infected from her master's cows, and was inserted by two superficial incisions into the arms of James Phipps, a healthy boy of about eight years of age. The cow-pox ran its ordinary course without any injurious effect, and the boy was afterward inoculated for the small-pox,--happily in vain. The protection was complete; and Jenner thenceforward pursued his experiments with redoubled ardor. His first summary of them, after having been examined and approved by several friends, appeared under the title of 'An Inquiry into the Causes and Effects of the Variolae Vaccinae,' in June,