Klemensiewicz was born in
Kraków. His father, Robert, was a teacher of history and geography and a headmaster of a secondary school; his mother was a translator from Scandinavian languages into Polish. From 1892 the family lived in
Lwów, where he finished Polish gymnasium. In the years 1904–1908, he studied chemistry, physics, and mathematics at the
Lwów University, where his professors included
Wacław Sierpiński,
Marian Smoluchowski,
Stanisław Tołłoczko,
Kazimierz Twardowski and Leonard Bronisław Radziszewski. During the WWI, he worked at first as a professor at the Pasteur Institute, and then in a plant manufacturing
Solvarsan. In 1920 - 1940, he was an
ordinary professor of physics and electronics at the
Lwów Polytechnic. In years 1940 to 1942, he was in
Kazakhstan (
deported), then Iran, Egypt, and Great Britain (1944 until 1956). From 1956, he was a professor at the
Silesian University of Technology in
Gliwice. Klemensiewicz was also an accomplished
mountaineer and
skier, author of the first Polish-language manual on mountain climbing (1913), co-founder and vice-president (1922–1939) of Polish Skiing Association (pl:Polski Związek Narciarski). He died, aged 76, in
Gliwice. == References ==