Here's a rebuild of a part of #CharlesBabbage's #DifferenceEngineNumberTwo, by the team led by #DononSwade at London's #ScienceMuseum. It implements an adder.

Interestingly, the exhibit includes a foot-operated metal lathe from 1910, likely closely modelled on the type of lathe that Babbage commissioned 70 years earlier. It was capable of achieving tolerances of 0.1mm.

#HNF #HNFPaderborn #ExtremeRetroComputing