Chapter II: Introduction: , BY PROFESSOR TYNDALL xi

RECOLLECTIONS OF CHILDHOOD
AND YOUTH--FIRST DISCOVERIES 1

FERMENTATION 40

ACETIC FERMENTATION--
THE MANUFACTURE OF VINEGAR 66

THE QUESTION OF SPONTANEOUS GENERATION 89

STUDIES ON WINE 112

THE SILKWORM-DISEASE 127

DECISIVE EXPERIMENTS 164

STUDIES ON BEER 168

VIRULENT DISEASES--SPLENIC FEVER,
SEPTICÆMIA 176

FOWL CHOLERA 212

ATTENUATED VIRUS, OR VACCINATION--
THE FOWL CHOLERA VACCINE 220

THE VACCINE OF SPLENIC FEVER 231

THE RETURN TO VIRULENCE 246

ETIOLOGY OF SPLENIC FEVER 250

METHOD OF DISCUSSION AND CONTRADICTIONS 262

THE LABORATORY OF THE ÉCOLE NORMALE--
VARIOUS STUDIES--HYDROPHOBIA 271