Summary
Percy Williams Bridgman's "The Nature of Physical Theory" argues that the fundamental criterion for the validity of a physical theory lies in the operational definition of its terms. He emphasizes that a concept is only meaningful if its meaning can be objectively determined through a set of concrete, measurable operations. This approach aims to prevent the proliferation of meaningless concepts and ensures that scientific discourse is grounded in observable reality.
The book addresses how abstract physical concepts arise and are validated, highlighting the potential for confusion when terms are not operationally defined. Bridgman stresses the importance of rigorous, empirical verification for scientific progress, contrasting the development of physical theories with advancements in fields like agricultural chemistry and physics where tangible results and systematic research are evident.
Key concepts
- Operational Definition — The meaning of a concept is determined by the set of operations used to measure it.
- Agricultural Chemistry — A field of science that investigates chemical processes and phenomena related to agriculture.
- Physical Theory — A systematic explanation of physical phenomena, evaluated by the operational definitions of its terms.
- Agricultural Physics — A branch of science focusing on the physical aspects of agricultural practices and processes.
From the book
See also A cappella on Wikipedia ; and the disclaimer . 5048826 The New International Encyclopædia , Volume I A - Aristogoras — A Capella A CAPELLA, ä kȧ-pĕl′lȧ (Ital., in the church style). Music for voices without accompaniment, like the early church compositions. The term is also used when the accompaniment is octaves or unison. As an indication of time it is equivalent to all breve (q.v.).← A Capella The New International Encyclopædia , Volume I A - Aristogoras A Capriccio Acapulco → Edition of 1905. See also A capriccio on Wikipedia ; and the disclaimer . 5048827 The New International Encyclopædia , Volume I A - Aristogoras — A Capriccio A CAPRICCIO, ä kȧ-prē′chō̇ (Ital.). At the caprice or pleasure of the performer, regarding both time and expression. A musical term.← Aargau The…
See also Åsværet on Wikipedia ; and the disclaimer . 1450884 The New International Encyclopædia , Volume I — Aasvär AASVÄR, a̤s′vâr . Islands off Norway, about latitude 66° ( Map: Norway , D 3). They have herring fisheries, in which more than 10,000 men are employed in December and January, but for the rest of the year they are almost deserted. The fish is the great Nordland herring, and the catch often reaches 200,000 tons in a season.← Aasvogel The New International Encyclopædia , Volume I Ab Ababde → Edition of 1905. See also Av (month) on Wikipedia ; and the disclaimer . 5038223 The New International Encyclopædia , Volume I — Ab AB, ăb . The fifth month of the Jewish religious year, and the eleventh (in intercalary years the twelfth) of the Jewish civil year. The first day of Ab…
See also Ababda people on Wikipedia ; and the disclaimer . 5038224 The New International Encyclopædia , Volume I — Ababde ABAB′DE. A Hamitic people west of the Red Sea, below Kosseir. Their habits are those of the desert, the camel being their chief domestic animal.← Ababde The New International Encyclopædia , Volume I Abaca Abaco, Great and Little → Edition of 1905. See also Abacá on Wikipedia ; and the disclaimer . 5038225 The New International Encyclopædia , Volume I — Abaca AB′ACA. A term used in the Philippine Islands to designate the plant which produces manila hemp. See Hemp, Manila .
Popular questions readers ask
- If you had to explain the *essence* of an encyclopedia to someone who has never seen one, what common features or goals would you highlight based on the diverse examples of "A Capella," "Aarhus," and "Aaron"?
- Beyond the literal definition, what deeper implications does the "public domain" status of this 1905 encyclopedia have for its accessibility and use today? How would you articulate this significance to a fellow student?
- Compare and contrast the types of information provided for "A Capella" versus "Aarhus." What does this variation reveal about the scope and editorial decisions behind a comprehensive reference work?
- Imagine you need to teach someone the difference between "A Capella" and "A Capriccio" using only analogies or real-world examples not found in the text. How would you simplify these musical concepts for a complete novice?
- Considering the publication date of 1905, how might the population statistics for Aarhus or the entry for Aaron (biblical) reflect the cultural and academic priorities of that era? What insights does this offer about knowledge itself?