Leona Marshall Libby (1919–1986) was Professor of Environmental Science and Engineering at the University of California at Los Angeles. As a member of the Manhattan Project, she participated in the design, building, and operation of the first nuclear reactor.

• Foreword (Rainer Berger) Acknowledgments Preface Introduction: The Discovery of Isotopes 1. Principles 2. The Experimental Approach History and Technology Sample Preparation Recent Trees and Thermometer Records Old Trees and Surrogate Evidence Climate Periods The Bioorganic Reservoir Other Climate Indicators: Commodities, Prices, and Wages 3. Human Interaction with Climate The Relation of Tree Thermometry to Meteorology and Geophysical Climate Assessment Early Hominid Evolution in Changing Climates Cultural and Climatic Changes during the Pleistocene The Spread into the Climate of Europe The Adaptability of Cro-Magnons to Many Climates Human Mitigation of Climate: Shoes Appendix 1. Equations Explanatory of the Text Appendix 2. The Slope of Eight Appendix 3. The Theory of Isotope Fractionation in Cellulose Name Index

Leona Marshall Libby (1919–1986) was Professor of Environmental Science and Engineering at the University of California at Los Angeles. As a member of the Manhattan Project, she participated in the design, building, and operation of the first nuclear reactor.

• Foreword (Rainer Berger) Acknowledgments Preface Introduction: The Discovery of Isotopes 1. Principles 2. The Experimental Approach History and Technology Sample Preparation Recent Trees and Thermometer Records Old Trees and Surrogate Evidence Climate Periods The Bioorganic Reservoir Other Climate Indicators: Commodities, Prices, and Wages 3. Human Interaction with Climate The Relation of Tree Thermometry to Meteorology and Geophysical Climate Assessment Early Hominid Evolution in Changing Climates Cultural and Climatic Changes during the Pleistocene The Spread into the Climate of Europe The Adaptability of Cro-Magnons to Many Climates Human Mitigation of Climate: Shoes Appendix 1. Equations Explanatory of the Text Appendix 2. The Slope of Eight Appendix 3. The Theory of Isotope Fractionation in Cellulose Name Index

Leona Marshall Libby (1919–1986) was Professor of Environmental Science and Engineering at the University of California at Los Angeles. As a member of the Manhattan Project, she participated in the design, building, and operation of the first nuclear reactor.

• Foreword (Rainer Berger) Acknowledgments Preface Introduction: The Discovery of Isotopes 1. Principles 2. The Experimental Approach History and Technology Sample Preparation Recent Trees and Thermometer Records Old Trees and Surrogate Evidence Climate Periods The Bioorganic Reservoir Other Climate Indicators: Commodities, Prices, and Wages 3. Human Interaction with Climate The Relation of Tree Thermometry to Meteorology and Geophysical Climate Assessment Early Hominid Evolution in Changing Climates Cultural and Climatic Changes during the Pleistocene The Spread into the Climate of Europe The Adaptability of Cro-Magnons to Many Climates Human Mitigation of Climate: Shoes Appendix 1. Equations Explanatory of the Text Appendix 2. The Slope of Eight Appendix 3. The Theory of Isotope Fractionation in Cellulose Name Index