births

Harry Schmidt, German mathematician and physicist (died 1951)

Harry Schmidt (mathematician)

Harry Schmidt was a German mathematician. Core areas of his research were experimental physics, as well as the theory of boundary layers and wings in aerodynamics.
Source: Wikipedia (CC BY-SA)

June 21

Day of the year

June 21 is the 172nd day of the year in the Gregorian calendar; 193 days remain until the end of the year.
Source: Wikipedia (CC BY-SA)