Left: One of Wehrli’s contemporary photographs showing petrified trees of the Orth Monument in Chemnitz-Hilbersdorf taken on the 17th of April 1913. (Reproduced by permission of the ETH Zurich, Wehrli, Leo / Dia_247-01766 / CC BY-SA 4.0). Right: Wehrli’s photographs of fossil woods from the Zacharias Collection on 22nd October 1913. The slide glass plates of Wehrli’s photographs have been preserved until today at the ETH Zurich (Reproduced by permission of the ETH Zurich, Wehrli, Leo / Dia_247-02165 / CC BY-SA 4.0).

 
 
  Part of: Löcse F, Rößler R (2022) Paul Geipel’s palaeobotanical collection – one of the largest and most important former private collections of the Petrified Forest of Chemnitz. Geologica Saxonica 68: 11-20. https://doi.org/10.3897/gs.68.e86213