Preface; List of contributors; 1. Why there are no ready-made phenomena: what philosophers of science should learn from Kant Michela Massimi; 2. Reduction, unity, and the nature of science: Kant's legacy? Margaret Morrison; 3. Invariance principles as regulative ideals: from Wigner to Hilbert Thomas Ryckman; 4. Objectivity: a Kantian perspective Roberto Torretti; 5. Einstein, Kant, and the a priori Michael Friedman; 6. Contingent transcendental arguments for metaphysical principles Hasok Chang; 7. Arithmetic from Kant to Frege: numbers, pure units, and the limits of conceptual representation Daniel Sutherland; 8. Intuition and infinity: a Kantian theme with echoes in the foundations of mathematics Carl Posy; References.