| Introduction | |
| Sources for the History of the Concept of Symbol from Leibniz to Cassirer | p. 3 |
| Leibniz's "Cognitio Symbolica" and the Theory of Expression | p. 4 |
| Kant: Schema and Symbol | p. 8 |
| The Rediscovering of the Sign | p. 12 |
| Hermann von Helmholtz and Heinrich Hertz | p. 16 |
| Intermezzo: Hertz and Wittgenstein | p. 20 |
| From Moritz Schlick to Ernst Cassirer | p. 22 |
| Knowledge as Symbolic Form | p. 25 |
| On the Use and Character of Symbols in Modern Physical Theories | p. 33 |
| Some Remarks About Physics | p. 33 |
| On the Physicist's Part in Epistemological Discussions | p. 33 |
| On the Requirements upon Physics | p. 34 |
| On the Dynamics of Physics Development | p. 36 |
| Questions of the Dynamics of the Symbolic Structures | p. 38 |
| Some Remarks Concerning Physical Symbols | p. 39 |
| Symbols and Things | p. 39 |
| The Valences of the Physical Symbols | p. 41 |
| On the Status of the Symbols | p. 41 |
| On the Association of Symbols to "Things" | p. 43 |
| The Constructive Aspect of the Necessity in the Association Symbols-to-Things | p. 45 |
| On the Establishment of Physical Concepts | p. 45 |
| Modern Fundamental Physical Theories and Their Relations | p. 47 |
| The Structure of Physics Research | p. 47 |
| Established Physical Theories | p. 50 |
| Relations Between Theories | p. 52 |
| Evolution of Symbols | p. 58 |
| On the Symbols of Modern Physical Theories | p. 61 |
| On Physical Knowledge and Scientific Progress | p. 63 |
| The "Pragmatic" Attitude of Physicists | p. 63 |
| On Justification and Truth | p. 65 |
| On Intuition and A Priori | p. 67 |
| On Scientific Progress | p. 68 |
| Views on Symbol in the Philosophy of Science | |
| The Symbol in the Theory of Science: Duhem's Alleged Instrumentalism or Conventionalism and the Continuity of Scientific Development | p. 75 |
| Changes in the Theory Concept During the 19th Century | p. 75 |
| The Symbolic Nature of Scientific Theories | p. 77 |
| Duhem: An Instrumentalist or a Conventionalist? | p. 80 |
| Natural Classification and the Systems Concept | p. 85 |
| Natural Classification and the Continuity of Scientific Development | p. 91 |
| Beyond Realism. Symbolism in the Philosophy of Science | p. 97 |
| Sign and Science: Peirce and His Predecessors | p. 98 |
| Symbolism or Realism: Is There an Alternative? | p. 104 |
| Heinrich Hertz and the Concept of a Symbol | p. 109 |
| Hertz on Helmholtz's Theory of Signs | p. 109 |
| The Comparison of Electrodynamic Theories | p. 110 |
| The Objective of Principles of Mechanics | p. 113 |
| The Concept of a Symbol or Image in Principles of Mechanics | p. 114 |
| Images and Models | p. 116 |
| Criteria for the Evaluation of Images | p. 117 |
| Problems | p. 119 |
| Conclusion | p. 120 |
| On the Symbolic Structure of Physics | |
| Shifting Symbolic Structures and Changing Theories: On the Non-Translatability and Empirical Comparability of Incommensurable Theories | p. 125 |
| Symbolic Descriptions and the Choice of Conceptual Structures | p. 125 |
| Meaning, Theoretical Context, and Adequate Translation | p. 126 |
| Shifting Theoretical Ground: the Example of the Einsteinian Revolution | p. 130 |
| Incommensurable Quantities in Classical Electrodynamics and Special Relativity | p. 133 |
| Incommensurability, Split-up of Natural Kinds and Shifts in Reference | p. 138 |
| Empirical Comparison of Theories with Incommensurable Concepts | p. 140 |
| Conclusion | p. 146 |
| Symbol and Intuition in Modern Physics | p. 149 |
| Language and Reality | p. 150 |
| Functions of Intuition | p. 158 |
| The Graspability of Cognition | p. 166 |
| Idealizations in Physics | p. 177 |
| An Example of an Idealization | p. 177 |
| The Concept of an Idealization | p. 177 |
| Different Kinds of Idealization | p. 178 |
| Production of Physical Systems | p. 178 |
| Isolation | p. 179 |
| Data Interpolation | p. 179 |
| Data Fitting | p. 180 |
| Abstraction | p. 181 |
| Idealization in the Narrow Sense | p. 181 |
| Neglect | p. 182 |
| Simplification | p. 182 |
| Mathematical Simplicity | p. 183 |
| Idealization and Reality | p. 184 |
| Essentialism | p. 184 |
| Idealizations and Empirical Adequacy I | p. 186 |
| Idealizations and Empirical Adequacy II | p. 188 |
| A Rationale for Abstractions | p. 189 |
| Conclusion: Idealization and Symbol | p. 191 |
| Symbolizing States and Events in Quantum Mechanics | p. 193 |
| Preliminaries: The Born Rule | p. 194 |
| Is the State Vector a Probabilistic System Description? The Main Argument | p. 195 |
| Two Objections | p. 200 |
| Quantum States and Quantum Events | p. 203 |
| Quantum Mechanics and the Classical World Picture | p. 207 |
| The Semiotics of "Postmodern" Physics | p. 211 |
| Introduction | p. 211 |
| Postmodern Fields of Physics | p. 212 |
| The Semiotics | p. 217 |
| The Semiotics of Postmodern Physics | p. 221 |
| Conclusions | p. 227 |
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