As you might expect from its name, the "Difference Engine" is a strangely difficult object to describe. You might start by imagining the side of a large crib with uprights ringed by small metal wheels ...

In the mid-1800s, Charles Babbage got fed up with doing complex calculations by hand, so he designed what he called a "Difference Engine." He... A 19th-Century Mathematician Finally Proves Himself ...

The article written by Percy E. Ludgate in 1909 first gives thanks to Professor C. V. Boys, F.R.S. for his assistance on the subject of analytical machines. Ludgate also refers to the work of Charles ...