in 1897 was the establishment of a "seismic station" under the direction of Straubel. Straubel improved seismometers with optical recording. Straubel remained head of the seismological station in Schillergäßchen until 1919. The successor to the Jena Seismic Institute was Oskar Hecker.

In 1903, Straubel became one of the managing directors of Zeiss and Schott, succeeding Ernst Abbe. Felix Jentsch wrote in 1934:

As a result of his high general intelligence and his many years of training in mathematics and physics, but above all

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