At the annual meeting of the American Association for the Advancement of Science in Washington, D.C., 27 December 1966, a symposium was held to commemorate the 50th anniversary of the death of Ernst Mach, the physicist who was vitally concerned about philosophical foundations. It was arranged by Section B on Physics, and co-sponsored by Section L on the History and Philosophy of Science, as well as by the History of Science Society. Dr. Allen W. Astin, Vice-President of the Association and Director of the National Bureau of Standards, presided. Representing the Austrian ambassador, Dr. Ernst Lemberger, a few opening remarks on his behalf were made by Dr. Walter Hietsch. Also present was Dr. Ernest A. Lederer, a grandson of Ernst Mach. The contributors, to the symposium, mostly physicists, represented different backgrounds and differing points of view; they presented their review of Mach's work primarily in the light of subsequent developments. They all, however, share a common interest in the life and works of Ernst Mach. Two of them, Otto BlUh and Peter G. Bergmann, received their doctoral degrees in theoretical physics from the University of Prague. Karl Menger received his doctoral degree in mathematics from the University of Vienna (he is responsible for the latest edition [1960] of Mach's celebrated The Science of Mechanics: A Critical and Historical Account of its Development, for which he prepared a new Introduction).

By exploring Mach's views on science as well as philosophy, this book attempts to wrest him free from his customary association with logical positivism and to reinterpret him on his own terms as a natural philosopher and naturalist about human knowledge. Physicists, psychologists, philosophers of science, historians of twentieth-century thought and culture, and educators will find this volume a valuable help in interpreting Mach's ideas.

Section Guide 1. Prolegomena 2. Biographical Sketch 3. Epistemology 4. Textbook Ontology 1. PROLEGOMENA While both philosophers and historians almost always love truth and the search for truth, and both often carry out extensive research, there can be noticeable differences when historians write about the history of philosophy and when philosophers write about it. Philosophers often look at the past with categories and interests taken from the present or at the least from the recent past, but many historians, especially those who love research for its own sake, will try to look at the past from a perspective either from that period or from even earlier. Both camps look for roots, but view them with different lenses and presupposi tions. This prolegomena has been added to prepare some philosophers for what will hopefully only be the mildest of shocks, for seeing the history of philosophy in a way which does not treat what is recent or latest as best, but which loves the context of ideas for its own sake, a context which can be very foreign to contemporary likes and dislikes. To be sure, we historians can deceive ourselves as easily as philosophers, but we tend to do so about different things.

This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

The famous physicist explains early experiments, studies on polarization, the mathematical representation of the properties of light, and refinements and advances in theory. 279 figures. 10 portraits. 1926 edition.

xi should hope for "first and foremost" from any historical investigation, including his own, was that "it may not be too tedious. " II That hope is generally realized in Mach's historical writings, most of which are as lively and interesting now as they were when they appeared. Mach did not follow any existing model of historical or philosophical or scientific exposition, but went at things his own way combining the various approaches as needed to reach the goals he set for himself. When he is at his best we get a sense of the Mach whom William James met on a visit to Prague, the Mach whose four hours of "unforgettable conversation" gave the forty year old, well traveled James the strongest "impression of pure intellectual genius" he had yet received, and whose "absolute simplicity of manner and winningness of smile" captivated him completely. 12 Consider, for example, the first few chapters of this book, Principles of the Theory of Heat, which Mach devotes to the notion of temperature, that most fundamental of all thermal concepts. He begins by trying to trace the path that leads from our sensations of hot and cold to a numerical temperature scale.