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 ...

A note on the value of money in the nineteenth century -- pt. 1. The difference engine -- ch. 1. The tables crisis -- ch. 2. A personal question -- ch. 3. Tragedy and decline -- ch. 4. Miracles and ...

This is the first printing calculator sold. From ancient times, scientists and mathematicians have calculated numerical tables. These tables were often rife with error, both from incorrect ...