Preface; R.S. Cohen. A Personal Appreciation. Erwin Nick Hiebert: The Wisconsin Years; R.H. Stuewer. A Personal Appreciation. Erwin Nick Hiebert: The Harvard Years; J.L. Richards. Introduction; M.J. Nye. Part I: Natural Theology, Natural Philosophy, and the Certainty of Mathematics. 1. Devils' Hells and Astronomers' Heavens: Religion, Method, and Popular Culture in Speculations about Life on Comets; S. Schechner Genuth. 2. The Doctrine of Chances without Change: Determinism, Mathematical Probability, and Quantification in the Seventeenth Century; L.J. Daston. 3. God, Truth, and Mathematics in Nineteenth-Century England; J.L. Richards. Part II: Problems of Contingency, Coherence, and Truth. 4. Theologians, Science, and Theories of Truth in Nineteenth-Century Germany; F. Gregory. 5. Equivalence, Pragmatic Platonism, and Discovery of the Calculus; S. Sigurdsson. Part III: The Aims and Foundations of Physical Science: The Cases of Electrical Physics, Psychophysics, and Physical Chemistry. 6. The Training of German Research Physicist Heinrich Hertz; J.Z. Buchwald. 7. From Psychophysics to Phenomenalism: Mach and Hering on Color Vision; R.L. Kremer. 8. A Usable Past: Creating Disciplinary Space for Physical Chemistry; D. Kormos Barkan. Part IV: Explanation and Discovery: The Claims of Chemistry, Physics, and Fortran. 9. Physics and Chemistry: Commensurate or Incommensurate Sciences? M.J. Nye. 10. Fortran, Physics, and Human Nature; P. Galison. Name Index. Appendix I: Erwin N. Hiebert's Doctoral Students and Directed Dissertations. Appendix II: Erwin N. Hiebert: Selected List of Publications.