births
Ludwig Holborn, German physicist (died 1926)
Related Wikipedia articles
Ludwig Holborn
Ludwig Friedrich Christian Holborn was a German physicist known for his work in the measurement of high temperature using optical pyrometry.Source: Wikipedia (CC BY-SA)
September 29
Day of the year
September 29 is the 272nd day of the year in the Gregorian calendar; 93 days remain until the end of the year.Source: Wikipedia (CC BY-SA)