HARVEY AND THE CIRCULATION OF THE BLOOD.
The discovery of the circulation of the blood was the most important ever made in the science of physiology, and led to a complete revolution throughout the whole circle of medical knowledge and practice. The renown of this splendid discovery, by all but universal consent, has been attributed to William Harvey, an English physician, who was born at Folkestone in 1578, and in 1593 went to Caius College, Cambridge, where he remained four years. He then went abroad for several years, studying in the most famous medical schools; and in 1604, having passed M.D. at Cambridge, he set up in practice in London. In 1615 he was appointed Lecturer at the College of Physicians, on Anatomy and Surgery; and it was in the performance of these duties that he arrived at the important discovery that is inseparably associated with his name. "The merit of Harvey," it has been justly observed, "is enhanced by considering the degraded state of medical knowledge at that time in England. While anatomical schools had been long established in Italy, France, and Germany, and several teachers had rendered their names illustrious by the successful pursuit of the science, anatomy was still unknown in England, and dissection had hitherto hardly begun; yet at this inauspicious period did Harvey make a discovery, which amply justifies Haller in ranking him as only second to Hippocrates." In 1620 he promulgated his new doctrine of the circulation of the blood, in a treatise entitled Exercitatio Anatomica de Motu Cordis et Sanguinis in Animalibus; in the preface to which, addressed to the College of Physicians, he states that frequently in his lectures he had declared his opinion touching the motion of the heart and the circulation of the blood, and had for more than nine years confirmed and illustrated that discovery by reasons and arguments grounded on ocular demonstration. The attention of all Europe, and the keen opposition of many of its medical scholars, were at once aroused by Harvey's publication; but his doctrine triumphed over all objections, and before he died he had the happiness of seeing it fully established. Harvey was physician to James I. and Charles I., the latter of whom had a high regard for him; and at the outbreak of the civil war he adhered to the royal side, and quitted London with the king, attending him at the battle of Edgehill, and afterwards at Oxford. He died in 1658, it is said from the effects of opium which he had taken with suicidal intent, while suffering under the acute pangs of gout. Posterity has been more faithful and grateful than his own age to the greatest modern discoverer in medical science; for his discovery rather tended to push him back than to advance him in professional position. It has been said that "perhaps his researches took him out of the common road to popular eminence, and they seem to have exposed him to the prejudice so commonly prevailing against an innovator; for we find him complaining to a friend, that his practice considerably declined after the publication of his discovery."