Note 47 — Appendix.

“The Difference-Engine could only tabulate, and was incapable by its nature of developing; the Analytical-Engine was intended to either tabulate or develop. The Difference-Engine is the embodying of one particular and very limited set of operations, the Analytical-Engine, the embodying of the science of operations. The distinctive characteristic of the Analytical-Engine, is the introduction into it of the principle which Jacquard devised for regulating by means of punched cards the most complicated patterns in the fabrication of brocaded stuffs. Nothing of the sort exists in the Difference-Engine. We may say most aptly, that the Analytical-Engine weaves Algebraical patterns, just as the Jacquard loom weaves flowers and leaves!”⁠—Note to translation of Menabrea’s Memoir. The 59th volume of the Edinburgh Review contains an able and elaborate article upon the Difference-Engine, written by Dr. Lardner.