Stepped reckoner

"... it is beneath the dignity of excellent men to waste their time in calculation when any peasant could do the work just as accurately with the aid of a machine." (G.W.L, 1673)
  • presented to Royal Society on 1st February 1673
  • could add, subtract, multiply and divide
  • "the core component is a so-called "Leibniz wheel"
click, swipe or press → to begin