Related Object Info
numerical ring from Babbage's first difference engine
This is the silver-metal numerical ring that was once part of Charles Babbage's first difference engine. Made of German silver, it is engraved with numerals.
The ring would have shown a single digit of a larger, multi-digit numeral. It accompanied the posts, gears, and toothed wheels that were assembled by Charles Babbage's son, Henry P. Babbage to illustrate the mechanism for addition used by his father in his first difference engine designed in 1822.
