The idea was proposed last year by Mr. Graham-Cumming, who suggested a three-step project in which a decision would first be made on which blueprint to focus on, then a three-dimensional computer simulation would be created, and finally the machine would be built.

“I hope that future generations of scientists will stand before the completed Analytical Engine, think of Babbage and be inspired to work on their own 100-year leaps,” he wrote.

Babbage, who lived from 1791 to 1871, is rightfully known as the “father of computing.” But it would be left to a fellow scientist, Augusta Ada King, Countess of Lovelace, to fully appreciate that his inventions were more than just tools for automatically tabulating logarithms and trigonometric functions.

Lovelace — daughter of the poet Lord Byron — recognized that the Analytical Engine could be a more generalized media machine, capable of making music and manipulating symbols. And 113 years before John McCarthy coined the term “artificial intelligence,” she considered — and then rejected — the notion that computers might exhibit creativity or even thought.

While Babbage was driven by the desire to automate tabular data for military and related applications, Lovelace wrote a lengthy commentary on the design that would prove deeply influential when it was rediscovered in the middle of the 20th century.

Lovelace is known as the first programmer, because she designed a program for the unbuilt machine. The algorithm appears in a series of notes written by Lovelace after a friend of Babbage asked her to translate an Italian professor’s write-up of a lecture Babbage had given at the University of Turin.

The Lovelace notes are remarkable both for her algorithm for calculating the sequence known as Bernoulli numbers and for what would become known as the “Lovelace objection.” In passing, she commented that the Babbage computer would not originate anything, but rather could do only what it had been instructed. The implication was that machines would not be creative, and thus not intelligent.