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September 27, 2012

Calculating machines

"Johann Helfrich von Müller (January 16, 1746 – 1830) was an engineer in the Hessian army who conceived the Difference Engine in 1786. He has also designed - among other things - a large and powerful burning mirror, a sun clock, an air pump, an air gun, a barometer, a range finder device, etc."

Posted by Ghost of a flea at September 27, 2012 11:28 AM