Ernst Otto Beckmann
Ernst Otto Beckmann was a German pharmacist and chemist who is remembered for his invention of the Beckmann differential thermometer and for his discovery of the Beckmann rearrangement.
Ernst Otto Beckmann was born in Solingen, Germany on July 4, 1853 to a family headed by Johannes Friedrich Wilhelm Beckmann, a manufacturer. The elder Beckmanns factory produced mineral dyes, pigments, abrasives, and polishing material, and it was there that the younger Beckmann conducted his early chemical experiments. At the age of 17, Beckmann was persuaded by his father to study pharmacy instead of chemistry, and so in 1870 an apprenticeship was arranged in Elberfeld. However, Beckmann did not enjoy the working conditions and returned home, to his fathers disappointment. Told that a chemical career would be difficult if could not handle an apprenticeship in pharmacy, Beckmann then returned to Elberfeld to finish his work. He also worked at pharmacies in Arolsen, Burg an der Wupper, Leipzig, and Cologne.
Source: Wikipedia