CONTENTS CHAPTER ONE Nothing Spontaneous About It 4 CHAPTER TWO Early Studies in Chemistry 14 CHAPTER THREE Pasteurization 22 CHAPTER FOUR Vaccination and Curing Diseases 32 Important Dates 42 Stop and Think 44 Glossary 46 Learn More 47 Index 48 About the Author 48
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CHAPTER ONE SPONTANEOUS NOTHING ABOUT IT Louis Pasteur had been studying tiny creatures called microorganisms for years He was not alone By 1859 they were a subject of heavy debate Scientists were trying to determine where they came from A leading theory was spontaneous generation This is the idea that life can come from nonliving matter Early experiments seemed to show the idea was true In the 1600s Scientists intensely studied microorganisms in the 1800s but many questions about these tiny creatures remained 5
