Jules Émile Verschaffelt (27.1.1870-22.12.1955) was a Belgian experimental physicist and a member of the Belgian Academy of Sciences (1919). He was born in Ghent. In 1893 he received his doctorate at Ghent and in 1899 at Leiden. In 1906-14 he worked at the University of Brussels and in 1914 — 18 at Leiden, then as chief scientific secretary of the International Solvay Institute of Physics, and in 1929 — 40 he was professor at the university in Ghent.
His research concerned thermodynamics, molecular physics, low-temperature physics (the theory of capillary forces, the equation of state) and physical chemistry.