Claim: Heinrich Geißler is a German politician who descended from the craftsmen in the Thüringer Wald whichis a mountain range in the southern parts of the German state of Thuringia.
Evidence: Johann Heinrich Wilhelm Geißler (26 May 1814 in Igelshieb – 24 January 1879) was a skilled glassblower and physicist, famous for his invention of the Geissler tube, made of glass and used as a low pressure gas-discharge tube.