 Complete the following phrase:  Clemens Laby was born in Beuthen today known as Bytom, a mining town near Kattowitz today Katowice in Upper Silesia. Towards the end of his time at senior school, around 1920, he worked as an intern at the Oheimgrube today Wujek coal mine. He then moved on to the Technical University TU of Berlin where he studied mine engineering, obtaining his degree in or before 1926. It is from the record of his registration at the TU that his birth date and birthplace can be ascertained. The outcome of the 