The Electric elevator

At the 1880 Mannheim Industrial Exhibition at Mannheim, Germany, Siemens and Halske Company installed an electric elevator, which transported passengers to the top of an observation tower. Continue reading

Marcus Vitruvius Pollio

Marcus Vitruvius Pollio (born c. 80–70 BC, died after c. 15 BC), commonly known as Vitruvius or Vitruvi or Vitruvio, was a Roman author, architect, civil engineer and military engineer during the 1st century BC, Continue reading