and leaves his home at night to wander
amongst the tombs.

Oribasius was held to be the wisest man of his time. There was something
very charming in his manner and conversation, and the barbarians
considered him as little less than a god.

_Magnus_, a native of Mesopotamia, was a pupil of Zenon and lectured at
Alexandria. He was famous for his eloquence and dialectical skill, and
wrote a book on "Urine" which is referred to by Theophilus.

_Jacobus Psychristus_ was a famous physician who practised at
Constantinople, A.D. 457-474. He was called "the Saviour" because of the
great success of his treatment.

_Adamantius_ of Alexandria both taught and practised medicine. He was a
Jewish physician who was expelled from Alexandria in A.D. 415, and
settled in Constantinople.

_Meletius_ was a Christian monk who lived in the fourth century,
according to some authorities, but it is probable that he belonged to a
later period, the sixth or seventh century. He wrote on the nature of
man, but the book is of no value as a contribution to physiology.

_Nemesius_, Bishop of Emissa, at the end of the fourth century wrote a
book called "De Natura Hominis," and came very close to two important
discoveries, namely, the functions of the bile and the circulation of
the blood. Of the former, he wrote, "The yellow bile is constituted both
for itself and for other purposes; for it contributes to digestion and
promotes the expulsion of the excrements; and therefore it is in a
manner one of the nutritive organs, besides imparting a sort of heat to
the body, like the vital power. For these reasons, therefore, it seems
to be made for itself; but, inasmuch as it purges the blood, it seems to
be made in a manner for this also."[28]

With reference to the circulation of the blood, Nemesius wrote: "The
motion of the pulse (called also the vital power) takes its rise from
the heart and chiefly from its left ventricle. The artery is with great
vehemence dilated and contracted, by a sort of constant harmony and
order, the motion commencing at the heart. While it is dilated it draws
with force the thinner part of the blood from the neighbouring veins,
the exhalation or vapour of which blood becomes the aliment for the
vital spirit. But while it is contracted it exhales whatever fumes it
has through the whole body and by secret passages, as the heart throws
out whatever is fuliginous through the mouth and nose by
expiration."[29]

This book was f