Zygmunt Florenty Wróblewski (28.10.1845—16.04.1888) was a Polish physicist and a member of the Polish Academy of Sciences (1880). He was born in Grodno. He studied at Kiev University. He took part in the Polish uprising of 1863. Until 1869 he was in exile in Siberia. From 1882 he was professor at the University of Kraków.
His main research concerned the diffusion and the liquefaction of gases and the determination of the critical temperature. Having improved L. Cailletet's apparatus, in 1883, together with K. Olszewski, he obtained liquid oxygen in measurable quantities. They also achieved the liquefaction of nitrogen and came close to the liquefaction of hydrogen. He estimated the critical temperature of hydrogen (30 K), oxygen, nitrogen and carbon monoxide. He studied the electrical conductivity of metals at low temperatures. He died tragically in a fire in his laboratory.