DescriptionVelocipedeQuadricycle.jpg English: An object from the collections of the Science Museum (London) as copied from their ObjectWiki. Date Originally
DescriptionSchienen-Fahrrad-fuer-Bergwerke-7300941.jpg English: Tandem mining bike in Thuringia, Germany. Deutsch: Tandem-Fahrrad für den Bergbau in Thüringen