When the handle of the lens grinder is turned, both grindstone and lens revolve at different speeds. Leonardo da Vinci (1452-1519) was an Italian Renaissance architect, musician, anatomist, inventor, engineer, sculptor, geometer and painter.
When the handle of the lens grinder is turned, both grindstone and lens revolve at different speeds. Leonardo da Vinci (1452-1519) was an Italian Renaissance architect, musician, anatomist, inventor, engineer, sculptor, geometer and painter.