Słowa kluczowe: Andrzej Pelczar scholar, teacher, master, mathematics in Kraków, Studia Historiae Scientiarum, Prace Komisji Historii Nauki PAU / Proceedings of the PAU Commission on the History of Science, Studia Historiae Scientiarum, Prace Komisji Historii Nauki PAU / Proceedings of the PAU Commission on the History of Science, history of science in Central and Eastern Europe (Poland, Lithuania), Samuel Dickstein, Ignacy Domeyko, University of Vilna (Wilno, Vilnius), master’s thesis, history of differential calculus, Seweryn Józef Krzemieniewski, history of botany, biographies of Polish botanists, history of nature conservaton in Poland, natural science education, promotion of natural science, Tadeusz Przypkowski, the Przypkowski family, antique and modern sundials, history of science, gnomonics, Roman Ingarden, Institute of Human Sciences of the Polish Academy of Arts and Sciences, Polish Academy of Arts and Sciences, natural sciences, humanities, Andrzej Pelczar, history of science, philosophy of science, mathematics, Jagiellonian University, Polish Academy of Arts and Sciences, PAU Commssion on the History of Science, PAU Commission on the Philosophy of Natural Sciences / PAU Commission on the Philosophy of Sciences, Mathematics Genealogy Project, prosopography; mobility of scholars and sciences; France; Bohemia; Hungary; Poland; University of Montpellier; University of Orléans, University of Paris; University of Prague; University of Kraków; 14th–15th centuries; history of science, history of ethnography, industrial Germany, colonial Germany, the Philippines, Palau, Anna Semper, Carl Semper, colonial science, female scientists, natural history, history of biology, history of zoology, history of anthropology, Slavic archaeology, prehistory, Witold Hensel, Joachim Herrmann, East Germany, Poland, communism, history of science, history of archaeology, biography, Isaac Newton, engineering, scientific instruments, steam engine, history of navigation, 17th century science, scholarship funds, Jagiellonian University, Academy of Arts and Sciences in Kraków, history of mathematics in 19th and 20th centuries, history of Polish mathematicians, Georg-August University in Göttingen, Felix Klein, quantum statistical physics, Natanson statistics, Bose-Einstein statistics, black body radiation, Planck’s law of radiation, particle indistinguishability, Eileen Markley Znaniecka, Florian Znaniecki, Stefan (Szczepan) Mierzwa (Stephen P. Mizwa), Edith Brahmall Cullis-Williams, Fundacja Kościuszkowska, Uniwersytet Poznański, II wojna światowa, Andrzej Pelczar, Cracow school of dynamical systems, Cracow school of differential equations, Institut des Hautes Études Scientifiques in Bures-sur- Yvette (IHÉS), Bourbaki seminar, Grothendieck seminar, Thom seminar., Studia Historiae Scientiarum, Prace Komisji Historii Nauki PAU / Proceedings of the PAU Commission on the History of Science, evaluation of scientific journals in Poland in 2019, history, history of science, history and philosophy of science, Leonhard Euler (1707–1783), complete works, correspondence in French, Leonhardi Euleri Opera Omnia IVA/7, Central Europe, Ottoman Empire, nation-states, new social challenges, 1918–1923, scientific journals, history and philosophy of science, science studies, Scopus, WoS, ICI, DOAJ, ERIH +, Polish Academy of Arts and Sciences (PAAS), Institute of the History of Science of the Polish Academy of Sciences (IHS PAS), Commission of the History, Commission on the History of Science, Polish Academy of Arts and Sciences (PAAS), 2019/2020, Commission on the History of Science, Polish Academy of Arts and Sciences (PAAS), 2019/2020