Georg Friedrich Brander

3D Collection – a Universal Sun Ring for Telling the Time

2. August 20232. August 2023 Dorothea Regula Zimmermann, Roberta Flora Spano

This universal sun ring comes from the former collection of Rudolf Wolf (1816-1893). Wolf’s inventory dating from 1873 does not state clearly whether the universal sun ring was incorporated into the Wolf collection as a purchase or a donation. An improvement of the hanging sundial … Read more

3D Collection – a Theodolite by Georg Friedrich Brander

6. July 20235. July 2023 Dorothea Regula Zimmermann, Roberta Flora Spano

This 18th century theodolite is part of the Observatory Collection. It was created by Rudolf Wolf (1816-1893). He was a professor of astronomy, head of the Semper Observatory, director of the library of the Polytechnic (present-day ETH) and collector of astronomical instruments. He created an … Read more