became a member of the College of Physicians in London, and entered
into practice; and, I suppose, as an indispensable step thereto,
proceeded to marry. He very soon became one of the most eminent
members of the profession in London; and, about the year 1616, he was
elected by the College of Physicians their Professor of Anatomy. It
was while Harvey held this office that he made public that great
discovery of the circulation of the blood and the movements of the
heart, the nature of which I shall endeavour by-and-by to explain to you
at length. Shortly afterwards, Charles the First having succeeded to
the throne in 1625, Harvey became one of the king's physicians; and it
is much to the credit of the unfortunate monarch--who, whatever his
faults may have been, was one of the few English monarchs who have shown
a taste for art and science--that Harvey became his attached and
devoted friend as well as servant; and that the king, on the other
hand, did all he could to advance Harvey's investigations. But, as you
know, evil times came on; and Harvey, after the fortunes of his royal
master were broken, being then a man of somewhat advanced years--over
60 years of age, in fact--retired to the society of his brothers in and
near London, and among them pursued his studies until the day of his
death. Harvey's career is a life which offers no salient points of
interest to the biographer. It was a life devoted to study and
investigation; and it was a life the devotion of which was amply
rewarded, as I shall have occasion to point out to you, by its results.

Harvey, by the diversity, the variety, and the thoroughness of his
investigations, was enabled to give an entirely new direction to at
least two branches--and two of the most important branches--of what
now-a-days we call Biological Science. On the one hand, he founded all
our modern physiology by the discovery of the exact nature of the
motions of the heart, and of the course in which the blood is propelled