The manuscript series (bulk dates 1950-ca.1975) comprises papers and popular talks on physics, cosmology, geophysics, mathematics, quantum biology, psychology, philosophy, politics, and religion. The correspondence dates mainly after second World War . Correspondents include: E. Bagge, K. Bleuler, N. Bohr, M. Born, E. Brueche, S. Chandrasekhar, F. Dessauer, P. Dirac, A. Eddington, J. Ehlers, A. Einstein, W. Elsasser, H. Haber, W. Heisenberg, W. Heitler, F. Hund, O. Klein, P. Koch, R. Kronig, M. von Laue, W. Lenz, S. Matsushita, A. Mercier, Ch. Moeller, J. von Neumann, Y. Nishina, W. Pauli, M. Planck, E. Regener, E. Schroedinger, A. Sommerfeld, O. Stern, H. Tetrode, N. Timofeev-Ressovsky, B. L. van der Waerden, I. Waller, W. Weisskopf, K. Weizsacker, G. Wentzel, W. Westphal, H. Weyl, E. Wigner; there is also much correspondence with publishers. Collection also includes bibliographies, autobiographies, reminiscences, a few photographs, and records relating to Jordan's activities as president of the Akademie der Wissenschaften und der Literatur, Mainz, 1963-1967.