What is the difference between my useless machines and Calder's mobiles? I think it is best to make this clear, for apart from different materials the methods of construction are also quite distinct. They only have two things in common: both are suspended and both gyrate. But there are thousands of suspended objects and always have been, and I might point out that my friend Calder himself had a precursor in Man Ray, who in 1920 made an object on exactly the same principles later used by Calder.
Except: Bruno Munari, Design As Art.
