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
LOEWENHOECK IN 1675.--THE RELATION OF CONTAGION TO THE THEORY OF
SPONTANEOUS GENERATION.--NEEDHAM AND SPALLANZANI.--THE DISCOVERY OF THE
COMPOUND MICROSCOPE IN 1605.--THE PROOF THAT A LIVING ORGANISM IS THE
CAUSE OF A DISEASE.--ANTHRAX.--THE DISCOVERY OF THE ANTHRAX BACILLUS IN
1851.--THE CULTIVATION OF THE BACILLUS BY KOCH.--THE MODE OF
INFECTION.--THE WORK OF PASTEUR ON ANTHRAX.--THE IMPORTANCE OF THE
DISEASE 97

CHAPTER VI

CLASSIFICATION OF THE ORGANISMS WHICH CAUSE DISEASE.--BACTERIA SIZE
SHAPE STRUCTURE CAPACITY FOR GROWTH MULTIPLICATION AND SPORE
INFORMATION.--THE ARTIFICIAL CULTIVATION OF BACTERIA.--THE IMPORTANCE
OF BACTERIA IN NATURE.--VARIATIONS IN BACTERIA.--SAPROPHYTIC AND
PARASITIC FORMS.--PROTOZOA.--STRUCTURE MORE COMPLICATED THAN THAT OF
BACTERIA.--DISTRIBUTION IN NATURE.--GROWTH AND
MULTIPLICATION.--CONJUGATION AND SEXUAL REPRODUCTION.--SPORE
FORMATION.--THE NECESSITY FOR A FLUID ENVIRONMENT.--THE FOOD OF
PROTOZOA.--PARASITISM.--THE ULTRA MICROSCOPIC OR FILTERABLE
ORGANISMS.--THE LIMITATION OF THE MICROSCOPIC.--PORCELAIN FILTERS TO
SEPARATE ORGANISMS FROM A FLUID.--FOOT AND MOUTH DISEASE PRODUCED BY AN
ULTRA MICROSCOPIC ORGANISM.--OTHER DISEASES SO PRODUCED.--DO NEW
DISEASES APPEAR? 116