The final work of a distinguished physicist, this remarkable volume examines the emotive significance of time, the time order of mechanics, the time direction of thermodynamics and microstatistics, the time direction of macrostatistics, and the time of quantum physics. Coherent discussions include accounts of analytic methods of scientific philosophy in the investigation of probability, quantum mechanics, the theory of relativity, and causality. "[Reichenbach’s] best by a good deal."—Physics Today. 1971 ed.

First published in 1949 expressly to introduce logical positivism to English speakers. Reichenbach, with Rudolph Carnap, founded logical positivism, a form of epistemofogy that privileged scientific over metaphysical truths.

Hans Reichenbach, a philosopher of science who was one of five students in Einstein's first seminar on the general theory of relativity, became Einstein's bulldog, defending the theory against criticism from philosophers, physicists, and popular commentators. This book chronicles the development of Reichenbach's reconstruction of Einstein's theory in a way that clearly sets out all of its philosophical commitments and its physical predictions as well as the battles that Reichenbach fought on its behalf, in both the (...) academic and popular press. The essays include reviews and responses to philosophical colleagues, such as Moritz Schlick and Hugo Dingler; polemical discussions with physicists Max Born and D. C. Miller; as well as popular articles meant to clarify aspects of Einstein's theories and set out their philosophical ramifications for the layperson. At a time when physics and philosophy were both undergoing revolutionary changes in content and method, this book is a window into the development of scientific philosophy and the role of the philosopher. (shrink)

Hans Reichenbach ist heute in Nordamerika, wo er die Entwicklung deranalytischen Philosophie maßgeblich beeinflußte und zahlreiche bedeutende Schüler hatte (u.a.

The student of philosophy usually is not irritated by obscure formulations. On the contrary, reading the quoted passage he would presumably be convinced ...

We must restrict to mere probability not only statements of comparatively great uncertainty, like predictions about the weather, where we would cautiously ...

The Hans Reichenbach Papers comprise published and unpublished manuscripts, lectures, correspondence, photographs, drawings, and related materials from his early student days until his death. The correspondence contains about 9000 pages to and from Reichenbach; it ranges over his entire career. Those with whom Reichenbach maintained lifelong contact include Rudolf Carnap, Ernst Cassirer, Herbert Feigl, Philip Frank, Carl Hempel, Sidney Hook, Paul Oppenheim and Wolfgang Pauli. In addition, there is significant correspondence with von Astor, Bergmann, Bertalanffy, Dingler, (...) Dubislav, Einstein, Fraenkel, Frank, Freundlich, Grelling, Grünbaum, Paul Hertz, Hutten, Jordan, Landé, von Laue, Lewin, C.I. Lewis, Charles Morris, Nagel, Neurath, Northrop, Planck, Quine, Regener, Rougier, Salmon, Schillp, Schlick, Scholz, Schrödinger, Martin Strauss, Tarski, Vaihinger, Weiss, Williams, Zawarski, and Zilsel. The correspondence provides a valuable source of information about Reichenbach’s personal and philosophical development. It also provides primary source material for research into one of the 20th century most influential philosophical movements. Reichenbach’s manuscripts include many of his own notes as a student. Some go as far back as his university days in science and mathematics. Some of the most significant of these notes are those taken by him as a student of Albert Einstein on the special and general theories of relativity. There are four such notebooks dating from 1918. In addition there are his student notes on astronomy, Planck and electricity, Hilbert’s “Statistical Mechanics” and “Problems and Principles.” He also kept many of his lecture notes from Germany, Turkey, and the United States. The number of lectures runs to over 100 and provides a glimpse into the problems of philosophy and how he presented them to his students. Many of his lectures discussed principles of radio and issues in philosophy and modern science, often in form of popularizations of questions in relativity and quantum theory delivered on radio programs for a wider audiences. In addition to this there are an abundance of notes, calculations, and diagrams used to draft both published and unpublished papers. (shrink)

The Theory of Relativity and A Priori Knowledge will hereafter be cited as "RAK. " The German edition is out of print. 2 H. Reichenbach, The Philosophy of ...

Written by an internationally renowned philosopher, this volume offers a three-part philosophical interpretation of quantum physics. The first part reviews the basics of quantum mechanics, outlining their philosophical interpretation and summarizing their results; the second outlines the mathematical methods of quantum mechanics; and the third section blends the philosophical ideas of the first part and the mathematical formulations of the second part to develop a variety of interpretations of quantum mechanics. 1944 edition.

SummaryThe following two questions are examined: 1o Do the unobservable parameters possess precise, though unknown, values ? 2o If these unobservable values were known, would it be possible to make precise predictions of the reults of later measurements ?The answer is shown to be negative; the questions, therefore, are not meaningless, being capable of a falsification. The inquiry leads to the establishment of a principle of anomaly, more precisely speaking, of causal anomaly, which is to be added to Heisenberg's principle (...) of indeterminacy. This principle states that the principle of action by contact is violated whenever definite values are assigned to the unobserved quantities, i. e., when an exhaustive interpretation of quantum mechanics is used. The two most important exhaustive interpretations are given by the corpuscle and the wave interpretation; each leads to causal anomalies, though for different places.The causal anomalies can be eliminated by the use of a restrictive interpretation, which separates statements about unobserved quantities, as a third propositional class, from true or false statements. Bohr and Heisenberg have called such statements meaningless, without being able to eliminate them completely; these statements arte thus merely shifted into the metalanguage. In another version of the restrictive interpretation such statements are assigned a third truth value, the value indeterminate, and quantum mechanics is then presented in the form of a three‐valued logic.The inquiry is carried through without the presupposition of any philosophical conception; every interpretation is examined with respect to the consequences to which it leads. ‐ H. R.'. (shrink)

The first English translation of Hans Reichenbach's lucid doctoral thesis sheds new light on how Kant’s Critique of Pure Reason was understood in some quarters at the time. The source of several themes in his still influential The Direction of Time, the thesis shows Reichenbach's early focus on the interdependence of physics, probability, and epistemology.

The present state of the discussion on relativity -- The theory of motion according to Newton, Leibniz, and Huyghens -- Casualty and probability -- Aims and methods of modern philosophy of nature -- The principle of causality and the possibility of its empirical confirmation -- Rationalism and empiricism -- The freedom of the will -- On the explication of ethical utterances.

The syllogism has often been criticized. Yet the theory of the syllogism cannot be omitted from logic. Even if it were not for its historical significance, its nature as a chapter of class logic assigns to it a place in any presentation of logic.The usual exposition of the theory of the syllogism, however, whether given by the use of the familiar rules of the syllogism, or by the help of diagrams, appears clumsy and lacks the lucidity of modern chapters of (...) logic. The reason seems to be given in the inefficient notation, taken over from ancient and medieval logic. In the following I should like to present an improved notation, which combines some of the traditional features with modern ones, and which is based on the criticism of the syllogistic theory which I have given elsewhere. It will be seen that in the revised form the theory of the syllogism is apt to meet the standards of modern logic. (shrink)

In a review of my book “Wahrscheinlichkeitslehre”, Dr. Ernest Nagel has recently criticized some of my ideas on probability and induction. His review includes a good exposition of my ideas, and I have to thank him for his serious attempts to do justice to my results. He attacks, however, some very essential points of my theory. I may be allowed, therefore, to answer him as frankly and thoroughly as he attacks me.