The collection includes materials from Reiche's time in Germany at the University of Berlin and the University of Breslau and from throughout his career in the United States. The correspondence is on research topics including electromagnetism and aerodynamics. Correspondents include: Max Born, Albert Einstein, James Franck, Fritz Haber, Alexander Kolin, Rudolf Ladenberg, H. F. Ludloff, Otto Lummer, Ladislaus Natanson, Max Planck, and Erwin Schrd̲inger. The notes and calculations are about subjects such as nuclear physics, Einstein's equation and theoretical physics. The lecture notes and notebooks include lectures and course materials on atomic physics, electricity, hydrodynamics and elasticity, mechanics, optics, quantum theory, thermodynamics, and vector analysis. The manuscripts contain work on spectral analysis and wave theory, including final manuscripts, notes and drafts. The publications are comprised of works by Reiche and other scientists. The Hans Reiche Materials include notebooks on antennas, circuit analysis, and electricity, and an essay about his father. The collection also contains Reiche's diplomas.