A cube 

http://web.mat.bham.ac.uk/C.J.Sangwin/howroundcom/front.html 

http://web.mat.bham.ac.uk/C.J.Sangwin/howroundcom/straightline/Peaucellier1.html 

http://www.vandeveen.nl/Wiskunde/Constructies/Peaucellier.html 

http://www.vandeveen.nl/Wiskunde/Applets%20Constructies.htm 

http://kmoddl.library.cornell.edu/http://www.museo.unimo.it/theatrum/ 

Curvas mecanicas 

 

The Cube