Fran Bošnjaković was born on 12 Jnauary 1902 in Zagreb, Croatia. He studied in Zagreb and later in Dresden, Germany, where he graduated in 1925 as a mechanical engineer. In 1926 and 1927 he worked as a teaching assistant at the Laboratory for Mechanics of Technical School at Zagreb University. From 1928 till 1933 he was a research assistant at the Laboratory for Mechanics at Dresden High Mechanical Engineering School, where he was given a doctoral degree in 1928, while in 1931 he became a university teacher. In 1933 he taught thermodynamics at Technical School at the University of Belgrade and in 1936 he transferd to Technical school at Zagreb University, where he became a professor a year later. In 1961 he was invited to establish the Institute for Thermodynamics at the University of Stuttgart, Germany. The personal and scientific interest of prof. Bošnjaković cover the complete range of thermodynamics, out of which his work on exothermics, the exchange of heat and matter, evaporation and gas plazma should be especially noted.