: Hallo Chip,
: I have admired your constructions of various things and wonder if you have
: any relations to Christoffer Polhem, (the swedish Leonardo da
: Vinci)inventor of the "mechanical alfabet" including about 80
: "letters". He was the mechanical genius at the big coppermine of
: Falun as one example.
: Its a pity that no contraption of his alfabet is conserved but there is some
: sketches preserved and new models built in some museeums and science
: centers.
: I supply one link to three photos of three models.
: http://w1.346.telia.com/~u34601361/Hist %20of%20Tech.htm

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