Tchebyshev 1882

 

 

source: Andrew Butko (http://commons.wikimedia.org/wiki/File:Арифмометр.jpg)

 

 

source: Mechanisms by Tchebyshev

 

 

source: Mechanisms by Tchebyshev

 

 

source: Mechanisms by Tchebyshev

 

 

device for multiplication

source: Mechanisms by Tchebyshev

 

 

source: Mechanisms by Tchebyshev

 

 

source: Mechanisms by Tchebyshev

 

 

     

      

 

 

 

last updated: 24-Jan-12