The Black Forest Open Air Museum at the Vogtsbauernhof farm in Gutach has original Black Forest houses offering insights into farming life of the 16th and 17th centuries. The buildings were dismantled at their original sites, the individual pieces numbered and then re-erected to exactly the same plan in the museum. The German Clock Museum in Furtwangen gives a comprehensive cross-section of the history of the watchmaking and clockmaking industries. From this early precision engineering a formerly important phonographic industry developed in the 20th century; the history of leisure electronics is presented in the German Phono Museum in St. Georgen. The Schüttesäge Museum in Schiltach has information and living history demonstrations covering the themes of lumbering and timber rafting in the Kinzig valley as well as tanning. The Black Forest Costume Museum in Haslach im Kinzigtal offers an overview of the traditional costume of the whole of the Black Forest and its peripheral regions. Also in Haslach is the Hansjakob Museum and the Hansjakob Archive with numerous works of the writer, priest, politician, historian and chronicler, Heinrich Hansjakob. The MiMa Mineralogy and Mathematics Museum in Oberwolfach houses minerals and mining exhibits from the whole of the Black Forest and links them to mathematical explanations.