title: [Hans Jacob Mumenthaler (1729-1813) a Bernese optician and mechanic].
mesh_terms: D049671:History, 18th Century; D049672:History, 19th Century; D055095:Optics and Photonics / Q000266:history*; D013557:Switzerland
vernacular_title: Hans Jacob Mumenthaler (1729-1813), ein bernischer Opticus und Mechanicus.