Series include 1) Scientific works (174 folders for 1909-1966). Works on photochemistry and photophysics. Books "Fotokhimiia krasitelej i rodstvennykh organicheskikh soedinenij" ("Photochemistry of Dyes and Related Organic Compounds," 1947) and "Fotonika molekul krasitelej i rodstvennykh organicheskikh soedinenij" ("Photonics of Molecules of Dyes and Related Organic Compounds," ?); articles include "Fotokhimiia khlorofilla i fotosintez" ("Photochemistry of Chlorophyll and Photosynthesis," 1950); "Fotosintez v sverkhkorotkom ultrafiolete" ("Photosynthesis in Extra-short Ultra-violet", no earlier than 1957); "O prirode elementarnykh fotoreaktsij khlorofilla" ("On the Nature of Simple Photoreactions of Chlorophyll, 1958; lecture "O spectre poglashcheniia i tsevete neorganicheskikh veshchestv" ("On Absorbtion Spectrum and Colors of Non-organic staffs", 1938). Papers on general problems: "O sostoianii sovremennoj nauki i ee otlichitel'noj cherte" ("On the Modern Science and Its Most Characteristic Feature", 1952); "K stoletiiu so dnia rozhdeniia K.A. Timiriazeva. Razvitie Idej K.A. Timiazeva ob uchastii khlorofilla v reaktsiiakh fotosinteza v rabotakh sovetskikh uchenykh" ("To the 100th anniversary of Timiriazev. The Fortune of Timiriazev's Ideas about Participation of Chlorophyll in Photosynthesis Reactions in Works of Soviet Scientists", 1953?); "Azpiska o sostoianii anglijskoj nauki po probleme "Teoriia stroeniia, kinetiki i reaktsionnoj sposobnosti" ("Note about Recent Achievements of British Science in Problem "Theory of Structure, Cinetics and Reactivity", 1958). 2) Papers on administrative activity (44 folders for 1926-1967). Notes, reports, programmes, correspondence with the Department of Chemical Science of the Academy (with, among others, those related to forming the Scientific Council at the Academy of Science on the problem "Photosynthesis"); also correspondence concerning the chair for theoretical and applied spectroscopy at the physical department of Leningrad University (1947-1964), and concerning the activity of the Union for Fundamental (?) and Applied Chemistry (UPAC) (1958-1965). 3) Biographical papers (39 folders for 1913-1968) including those from Kaluga real school (1913-1914); lists of publications and inventories for 1922-1958. Documents related to election to the Academy and nominations to various prizes. Addresses and newspapers clippings devoted to his anniversaries and achievements. 98 folders with photos and portraits of, among others, Vavilov, Raman, Pringsheim, Landsberg, Frisch, Porter, Fok. 4) Correspondence (159 folders for 1921-1966); correspondents include: E. D. Buen, S. I. Volfkovich, A. I. Kiprianov, F. D. Klement, A. A. Krasnovskii, A. V. Palladin, D. Porter, D. S. Rozhdestvenskii, IA. K. Syrkin. 5) 24 folders with the works of other persons (1907-1966) including: A. I. Rabikovich, "Problema kolloidnoj khimii v III-ej piatiletke" ("The Problem of Colloidal Chemistry in 3d Piatiletka, no later than 1941); S.I. Volfkovich, "Puti sovremennoj khimii" ("Ways of Modern Chemistry", 1950); M.A. Porai-Koshits, "Mezomeriia i rezonans" ("Mesomery and Resonance", 1950).