For example , Difference Engine No. 2 , designed by Charles Babbage in the 19th century , was reconstructed from original drawings studied by Allan Bromley in the 1980s .
Is now on display at the Science Museum in London , England .
For example , Difference Engine No. 2 , designed by Charles Babbage in the 19th century , was reconstructed from original drawings studied by Allan Bromley in the 1980s and is now on display at the Science Museum in London , England .