CONTENTS. 
Chapter I.— Brief History of Bacteriology. 
Earliest days.—Perfection of the single lens.— 
The “Dutch Microscopist.”—His discoveries.— 
The compound microscope.—First account of the 
germ theory of disease.—A problem of ancient 
bacteriology.—Men who have made valuable con¬ 
tributions to the science.—Their discoveries. .9-19 
Chapter II.—The Relation of Bacteria to Disease. 
BACTERIA IN PROCESSES OF NATURE. 
Mysteries revealed by the microscope.—Cell 
formation.—The organs and systems of the 
body.—Health dependence.—Cell functions.— 
Cell derangement.—The term bacteria.—Bacteria 
as friends. Bacteria as enemies.—The first use 
of the term bacteria.—Relative size of sapro¬ 
phytic and parasitic families.20-26 
Chapter III.— Description of the Most Important 
Bacteria.—Methods of Multiplication, etc. 
Morphology.—Spore-forming bacteria. Non¬ 
spore-forming bacteria.—Development.—Multipli¬ 
cation.—Dimensions.—Coloring bacteria.—Pha¬ 
gocytes.—Phagocytosis.—Resistive power of 
spores.—Parent bacillus after spore formation; 
its life or death.27-33 
Chapter IV.—Bacterial Invasion. How Bacteria 
Gain an Entrance to the System. 
Parke’s list of communicable diseases.—Period of 
incubation.—Invasion.—Channels of Entrance.— 
Development of symptoms.—Ho.w infection is 
thrown off.—Sources whereby bacteria die within 
the body.—Immunity, natural, acquired, artificial. 
—Antitoxins—their preparation and uses.— 
Koch’s Circuit .34-41 
Chapter V.—Common Communicable Diseases. 
Why the term communicable has taken the place 
of the terms contagious and infectious.—The 
bacteria found present in some of the diseases 
