is more complex than is the acute, and there is more variation in the
single conditions. The chronicity may be due to a number of
conditions, as the persistence of a cause, or to incompleteness of
repair which renders the part once affected more vulnerable, to such a
degree even that the ordinary conditions to which it is subjected
become injurious. A chronic inflammation may be little more than an
almost continuous series of acute inflammations, with repair
continuously less perfect. Chronic imflammations are a prerogative of
the old as compared with the young, of the weak rather than the
strong.

FOOTNOTES:
[1] The term exudation is used to designate the
passing of cells and fluid from the vessels in inflammation; the
material is the exudate.

[2] By transudation is meant the constant interchange between
the blood and the tissue fluid.




CHAPTER V

INFECTIOUS DISEASES.--THE HISTORICAL IMPORTANCE OF EPIDEMICS OF
DISEASE.--THE LOSSES IN BATTLE CONTRASTED WITH THE LOSSES IN ARMIES
PRODUCED BY--INFECTIOUS DISEASES.--THE DEVELOPMENT OF KNOWLEDGE OF
EPIDEMICS.--THE VIEWS OF HIPPOCRATES AND ARISTOTLE.--SPORADIC AND
EPIDEMIC DISEASES.--THE THEORY OF THE EPIDEMIC CONSTITUTION.--THEORY
THAT THE CONTAGIOUS MATERIAL IS LIVING.--THE DISCOVERY OF BACTERIA BY