In 1954 Hempel wrote “Once the idea of a partial specification of meaning is granted, it appears unnecessarily restrictive, however, to limit the sentences effecting such partial interpretation to reduction sentences in Carnap's sense. … Generally, then, a set of one or more theoretical terms, t1, t2 ⃛, tn, might be introduced by any set M of sentences such that (i) M contains no extralogical terms other than t1, t2 ⃛, tn, and observation terms, (ii) M is logically consistent, and (iii) M is not equivalent to a truth of formal logic. The last two of these conditions serve merely to exclude trivial extreme cases. A set M of this kind will be referred to briefly as an interpretative system, its elements as interpretative sentences.” This is the last move in a process in which the idea of definition has been widened beyond the explicit or equivalence definition which was the basis of earlier thought on the subject of introducing new words into a language. It would seem that the scheme proposed by Hempel must represent the final move, for it would seem difficult to conceive any more liberal description of a purely direct and verbal scheme (that is, one excluding watching, and processes of suggestion). Among the predecessors of Hempel in this liberalising movement I will mention Ramsey and Braithwaite whose views stem ultimately from Campbell, and are based on the idea that the “interpretative system” is essentially a scientific theory, and Carnap who introduced the particular notion of a “reduction sentence” (mentioned in the quotation above), and who was more directly the source of Hempel's own ideas.

Radical ethical relativism as presented in Ruth Benedict's Patterns of Culture not only denies absolute values, its thesis of the incommensurability of cultural configurations precludes possibility of any agreement on values by individuals of different cultures. This fact provides the proper perspective from which to judge the current controversy between radical and “modified” ethical relativists. A double error is committed, therefore, by those who contend that there has been no reduction of the “area of indeterminacy” existing between the ethical principles of different cultures since, despite the newer developments in the social sciences, there are still no absolutely valid ethical values. Not only is the term “validity” vague and in need of reinterpretation, but, in assuming the denial of absolute values to be the distinguishing characteristic of radical relativism, they actually identify this theory with modified relativism. This brief paper attempts to prove the untenability of the denial of cross cultural agreement on ends and means by treating the question first, from the point of view of C. L. Stevenson's Dewey-inspired notion of the derivation of ends from means, and, second, from that of Stevenson's more original idea, complex ethical agreement.

The problem in the philosophy of science which interests me beyond all others is that of constructing an abstract deductive system isomorphic with the theory of the natural sciences. Clearly, this task must be the work of many years and many minds. Some portions of it have already been accomplished; but a great deal remains to be done, and the difficulties of the problems yet unsolved impress me as formidable. I believe, however, that it would be hard to overestimate the benefits which might follow from the construction of such an abstract theory, always provided that that theory met certain conditions. Not only must the system in question measure up to the standards of rigor and precision set by the logicians, but it must also be cast in such form that a working scientist could learn to understand at least that part of it applicable to his own specialty without being forced to drop his professional work and devote the labor of years to mastering the subject.

Most philosophical systems of ethics are based upon the reciprocity principle as expressed by the Golden Rule: “Do unto others as you would have them do unto you!” The same idea underlies Kant's categorical imperative: “Act always on such a maxim as thou canst at the same time will to be a universal law!” Here, the individual act is generalized into, and considered as the specific application of the general law of ethics.

Dmitri Mendeleev, while not creatively a philosopher of science, nor a student of systematic philosophy, was eminently a philosophical scientist. Concern about the nature and foundations of his science is evident throughout the text and footnotes of the Principles of Chemistry. One has to presume that his conclusions provided him with some direction for “the study of his great generalizations” in chemistry, especially for the greatest fruit of his efforts, the Periodic System of the Elements. At least it is apparent that somehow he acquired a much greater confidence in the feasibility of systemizing extant chemical knowledge than almost any of his contemporaries.

Theory and Practice; Precision and Vagueness. There has long been a conflict between the theory and the practice of scientific naming. The theory expressed both by working scientists and by philosophers has almost always been that precision is an essential part of the scientific attitude and of the procedures and results of science. Theoretically, metaphors have been scorned as belonging to poetry or to philosophy rather than to science. In scientific practice, however, vagueness and metaphor are constantly present; and they are particularly evident at the advancing frontiers of any science, whether mathematical, natural, or social.

Die neuere Naturwissenschaft trat im 17. Jahrhundert zuerst als “Physik” auf. Man soll sich an die Gründung der modernen Dynamik von Galileo und Newton erinnern.

Die methodisch-allgemeine Grundlegung dieser neuen Wissenschaft wird in der Cartesischen Philosophie am klarsten ausgedrückt.

These considerations on Carl G. Hempel's and Paul Oppenheim's lucid article “Studies in the Logic of Explanation'”—LE for short—are an attempt to exploit some of the considerable advances made there. I wish to show how these advances may be incorporated into a technique for the investigation of problems of the philosophy of science, which has been called discourse-analytic. This discipline consists essentially in a technique of examining actual texts provided by specialists, such as physicists, psychologists, historians, etc., the task being to discover fundamental logical and semantical features in the discourses under investigation. I am preparing a book on historical explanation, which will contain such case studies of historical texts.

(1) the author has outlined several of the more important interpretations of measurement in quantum mechanics and discussed the problems arising from them. Particular attention was paid to the work of Bohr, Heisenberg and von Neumann and a tentative proposal was made for a possible interpretation which would mitigate some of the problems and dilemmas. This interpretation was essentially that proposed by Margenau (2) in terms of latent variables. He defines measurement to be any operation with physical apparatus which results in a number, including in this, of course, yes and no answers as well as conventional numerical answers. Further he makes the distinction between the preparation of a state and the measurement of the state (3). A preparation puts the quantum system into a particular state whereas the measurement frequently destroys the state in question. This paper presents several criteria to help in the evaluation of the alternatives presented in the first paper and carries further the suggested interpretation mentioned at the end of that paper.