International Encyclopedia of Unified Science

The International Encyclopedia of Unified Science (IEUS) was a series of publications devoted to unified science. The IEUS was conceived at the Mundaneum Institute in The Hague in the 1930s, and published in the USA beginning in 1938. It was an ambitious project that was never completed.

The IEUS was an output of the Vienna Circle to address the "growing concern throughout the world for the logic, the history, and the sociology of science..." Only the first section Foundations of the Unity of Science (FUS) was published; it contains two volumes for a total of nineteen monographs published from 1938 to 1969.

Encyclopedia and Unified Science (FUS I-1)
Otto Neurath, Niels Bohr, John Dewey, Bertrand Russell, Rudolf Carnap, and Charles Morris

Foundations of the Theory of Signs (FUS I-2)
Charles Morris

Foundations of Logic and Mathematics (FUS I-3)
Rudolf Carnap

Linguistic Aspects of Science (FUS I-4)
Leonard Bloomfield

Procedures of Empirical Science (FUS I-5)
Victor F. Lenzen

Principles of the Theory of Probability (FUS I-6)
Ernest Nagel

Foundations of Physics (FUS I-7)
Philipp Frank

Cosmology (FUS I-8)
E. Finlay-Freundlich

Foundations of Biology (FUS I-9)
Felix Mainx

The Conceptual Framework of Psychology (FUS I-10)
Egon Brunswik

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