The collection includes files on the following people: Wladyslaw Nathanson, list of scientific publications printed in 1891-1899, 38 pp.; Tadeusz Banachiewicz, biography and list of scientific papers, 155 pp. Czeslaw Bialobrzeski, report from meeting of Russian physicists (1928), 120 pp., and a report from a scientific voyage to France (1928); Mieczyslsw Wolfke, report on research conducted in Leyden (1924), 151 pp.; Wojciech Rubinowicz, list of scientific works, 285 pp; Stefan Pienkowski, biography and list of works published to 1919, 60 pp.; Felicjan Kepinski, biography and list of works published works to 1935, 120 pp.; Szczepan Szczeniowski, biography and bibliography, 119 pp.