Karol Olszewski, Polish chemist, mathematician, and physicist (born 1846)

Karol Stanisław Olszewski was a Polish chemist, mathematician, and physicist. Together with Zygmunt Wróblewski, in 1883 he was the first scientist in the world to liquify oxygen and nitrogen.

March 24 is the 83rd day of the year in the Gregorian calendar; 282 days remain until the end of the year.